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Progesterone in pregnancy

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https://www.readbyqxmd.com/read/28637041/the-effects-of-fungicides-on-human-3%C3%AE-hydroxysteroid-dehydrogenase-1-and-aromatase-in-human-placental-cell-line-jeg-3
#1
Shuyan Cao, Leping Ye, Ying Wu, Baiping Mao, Lanlan Chen, Xiudi Wang, Ping Huang, Ying Su, Ren-Shan Ge
Placenta secretes a large amount of progesterone and estradiol, which are critical for maintaining pregnancy. In human placenta, 3β-hydroxysteroid dehydrogenase 1 (HSD3B1) catalyzes pregnenolone to form progesterone, and aromatase (CYP19A1) catalyzes testosterone into estradiol. Fungicides display antifungal activities and are widely used to prevent fungal infections in agricultural plants. These chemicals include azoles, such as tebuconazole (TEB), triadimefon (TRI), and vinclozolin (VCZ) or organotins, such as tributyltin (TBT) and tetrabutyltin (TTBT)...
June 22, 2017: Pharmacology
https://www.readbyqxmd.com/read/28635531/drug-exposure-in-early-pregnancy-might-be-related-to-the-effects-of-increased-maternal-progesterone-in-implantation-period
#2
Necip Girit, Ibrahim Tugrul, Buket Demirci, Ozlem Bozkurt, Turhan Dost, Mustafa Birincioglu, H Alper Tanriverdi
AIM: This short communication aims to evaluate the relation in between drug exposure time and early pregnancy regarding gestational weeks. METHODS: The study covers the referrals made to the Department of Pharmacology for a teratogenic consultation in a 3-year period. From the recordings of pregnant women, the last menstrual period and the starting date of medication were used to determine the time of prescription with regard to gestational weeks. RESULTS: In all of the three years, potentially teratogenic medication was prescribed more frequently in the 3rd, 4th and 5th gestational weeks (in between 15-35 days of pregnancy)...
February 15, 2017: Journal of Psychosomatic Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28631553/administration-of-progesterone-throughout-pregnancy-increases-maternal-steroids-without-adverse-effect-on-mature-oligodendrocyte-immunostaining-in-the-guinea-pig
#3
Julia C Shaw, Hannah K Palliser, Kerrin Palazzi, Jonathan J Hirst
Progesterone is administered to pregnant women at risk of premature labor, despite systematic reviews showing conflicting outcomes regarding its use, highlighting doubt over the effectiveness of the therapy. Progesterone can be rapidly metabolized into a number of steroids, but to date, there has been a lack of investigation into the fetal steroid profiles following administration and whether this impacts fetal neurodevelopment. The objective of this study was to determine the effect of progesterone treatment on allopregnanolone and cortisol levels in the fetus and on a marker of myelination in the fetal brain...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28630707/evidence-of-endometrial-amino-acid-metabolism-and-transport-modulation-by-peri-ovulatory-endocrine-profiles-driving-uterine-receptivity
#4
Moana Rodrigues França, Maressa Izabel Santos da Silva, Guilherme Pugliesi, Veerle Van Hoeck, Mario Binelli
BACKGROUND: In beef cattle, changes in the periovulatory endocrine milieu are associated with fertility and conceptus growth. A large preovulatory follicle (POF) and the resulting elevated concentrations of progesterone (P4) during diestrus positively affect pregnancy rates. Amino acids (AA) are important components of maternally derived secretions that are crucial for embryonic survival before implantation. The hypothesis is that the size of the POF and the concentration of P4 in early diestrus modulate the endometrial abundance of SLC transcripts related to AA transport and metabolism and subsequently impact luminal concentrations of AA...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28628844/serum-micrornas-in-buffalo-cows-potential-biomarkers-of-pregnancy
#5
Gabriella Guelfi, Valentina Stefanetti, Silvio De Luca, Andrea Giontella, Vittoria Lucia Barile, Olimpia Barbato
MiRNAs (microRNA) constitute a large family of single-stranded, non-coding small RNAs. Although the functions and target genes of most miRNAs are still unknown, it has been well established that they are involved in embryogenesis, organogenesis and neonatal birth. In recent decades, interest in buffalo breeding has largely increased worldwide thus focusing the attention on this species as a dairy purpose animal. Problems related to long calving interval, late puberty and seasonal anestrus hamper reproductive efficiency in this species...
June 4, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28628266/embryo-maternal-dialogue-during-pregnancy-establishment-and-implantation-in-the-pig
#6
REVIEW
Agnieszka Waclawik, Monika M Kaczmarek, Agnieszka Blitek, Piotr Kaczynski, Adam J Ziecik
Porcine conceptuses secrete pregnancy-recognition signals (estrogens, including estradiol-17β) that inhibit luteolysis, thereby prolonging progesterone production by corpora lutea. The supportive mechanism by which the conceptus also inhibits luteolysis is by shifting endometrial prostaglandin (PG) synthesis to luteoprotective PGE2. Progesterone stimulates endometrial production of factors that are essential for conceptus development. Priming the uterus by progesterone and loss of progesterone receptors from the uterine epithelium by D1ay 10-12 after estrus are key for achieving endometrial receptivity for implantation...
June 19, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28627668/potential-genetic-damage-to-nematode-offspring-following-exposure-to-triclosan-during-pregnancy
#7
Aixia Zhang, Xiaohong Gu, Xiuping Wang, Lei Wang, Lihua Zeng, Xuemei Fan, Chen Jiang, Ziyi Fu, Xianwei Cui, Chenbo Ji, Hongming Qu, Xirong Guo
Triclosan (TCS) is widely used as broad-spectrum antibacterial agent. However, it may threaten the health of human offspring if the mother is exposed to TCS during pregnancy. The present study aimed to identify potential mechanisms behind the toxic effect of TCS on the offspring of Caenorhabditis elegans (C. elegans), using this nematode as a suitable animal model. The results of the current study demonstrated that the locomotory behavior and reproductive capacity of C. elegans offspring was severely affected by prenatal exposure to different concentrations of TCS...
June 13, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28620462/immunoprofiling-of-human-uterine-mast-cells-identifies-three-phenotypes-and-expression-of-er%C3%AE-and-glucocorticoid-receptor
#8
Bianca De Leo, Arantza Esnal-Zufiaurre, Frances Collins, Hilary O D Critchley, Philippa T K Saunders
Background: Human mast cells (MCs) are long-lived tissue-resident immune cells characterised by granules containing the proteases chymase and/or tryptase. Their phenotype is modulated by their tissue microenvironment. The human uterus has an outer muscular layer (the myometrium) surrounding the endometrium, both of which play an important role in supporting a pregnancy. The endometrium is a sex steroid target tissue consisting of epithelial cells (luminal, glandular) surrounded by a multicellular stroma, with the latter containing an extensive vascular compartment as well as fluctuating populations of immune cells that play an important role in regulating tissue function...
2017: F1000Research
https://www.readbyqxmd.com/read/28619691/a-mouse-model-of-antepartum-stillbirth
#9
Anum Rahman, Lindsay S Cahill, Yu-Qing Zhou, Johnathan Hoggarth, Monique Y Rennie, Mike Seed, Christopher K Macgowan, John C Kingdom, S Lee Adamson, John G Sled
BACKGROUND: Many stillbirths of normally-formed fetuses in the third trimester could be prevented via delivery if reliable means to anticipate this outcome existed. However, since the etiology of these stillbirths is often unexplained and, although the underlying mechanism is presumed to be hypoxia from "placental insufficiency", the placentas often appear normal on histopathologic examination. Gestational age is a risk factor for antepartum stillbirth, with a rapid rise in stillbirth rates after 40 weeks gestation...
June 12, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28619359/postpartum-estrogen-withdrawal-impairs-gabaergic-inhibition-and-ltd-induction-in-basolateral-amygdala-complex-via-down-regulation-of-gpr30
#10
Rong Yang, Baofeng Zhang, Tingting Chen, Suyun Zhang, Ling Chen
Postpartum estrogen (E2) withdrawal is known to be a particularly vulnerable time for depressive symptoms. In this study, ovariectomized (OVX) mice were treated with co-administration of estradiol benzoate and progesterone (E2/P4) followed by administration of E2 alone (E2) and a subsequent E2 withdrawal (EW) to mimic the hormonal changes during pregnancy and postpartum. The objective of this study was to investigate the influence of E2 withdrawal after hormone-simulated pregnancy on synaptic function and plasticity in basolateral amygdala complex (BLA)...
June 13, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28616248/lymphangioleiomyomatosis-an-explosive-presentation-of-a-rare-disease
#11
Faye Pais, Mohamed Fayed, Timothy Evans
Lymphangioleiomyomatosis (LAM) is a rare cystic lung disease, commonly affecting women in the reproductive age group. Exacerbation of pre-existing disease is common during pregnancy likely due to the up-regulation of estrogen and progesterone receptors present within the proliferating smooth muscle cells. This case highlights a dramatic presentation of LAM for the first time in pregnancy, its rapid progression during gestation, and a partial resolution with delivery. The unusual radiographic imaging in this patient, lacked the characteristic cystic lesions commonly associated with LAM, but instead demonstrated a dense interstitial pattern with micronodular expansion of the interlobular septa suggesting severe lymphatic obstruction...
June 2017: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28609392/the-role-of-hormone-therapy-in-the-management-of-severe-postpartum-depression-in-patients-with-turner-syndrome
#12
Alison K Shea, Wendy Wolfman
OBJECTIVE: Premature ovarian failure associated with Turner syndrome presents clinicians with a vast range of health concerns, including infertility, cardiovascular disease, and decreased bone mineral density, in addition to psychological sequelae. Hormone therapy is paramount in managing these complications, but the additional needs in the postpartum period for those who are able to carry out a successful pregnancy have not been described. METHODS: We present a case of severe postpartum depression (PPD) with psychotic features in a patient with Turner syndrome, which presented at 4 weeks after the birth of her first child via egg donation RESULTS:: We describe the case of a previously well 32-year-old patient with an 46 X, i(Xq) karyotype, who went through a 4-week intensive inpatient treatment course for PPD, requiring electroconvulsant therapy for persistent infanticidal and suicidal ideation...
June 12, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28608308/effect-of-reproductive-methods-and-gnrh-administration-on-long-term-protocol-in-santa-ines-ewes
#13
Marcos V Biehl, Marcos V C Ferraz Junior, Evandro M Ferreira, Daniel M Polizel, Alexandre A Miszura, José P R Barroso, Gabriela B Oliveira, Analisa V Bertoloni, Alexandre V Pires
This study aimed to determine whether reproductive performance of ewes submitted to laparoscopic timed artificial insemination (TAI) would be similar to ante meridiem (AM)/post meridiem (PM) rule and assisted natural mating (NM), and whether GnRH may enhance the pregnancy rate in TAI. In experiment I, 191 non-lactating ewes were synchronized, then TAI was performed either 48 h after progesterone (P4) removal (TAI-48 h) or 12 h after estrus detection (AM/PM); moreover, some ewes were submitted to NM (NM) as control treatment...
June 12, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28606454/high-oestradiol-concentration-after-ovarian-stimulation-is-associated-with-lower-maternal-serum-beta-hcg-concentration-and-neonatal-birth-weight
#14
Suying Liu, Yanping Kuang, Yu Wu, Yun Feng, Qifeng Lyu, Li Wang, Yijuan Sun, Xiaoxi Sun
In this retrospective study, the relationship between maternal serum oestradiol and progesterone levels after fresh embryo transfer or frozen embryo transfer (FET), and serum beta-HCG levels in early pregnancy and neonatal birth weight was examined. Included for analysis were 5643 conceived singletons: 2610 after FET and 3033 after fresh embryo transfer. Outcome measures included maternal serum oestradiol, progesterone, beta-HCG levels during the peri-implantation period, birth weight and small-for-gestational-age (SGA)...
May 22, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28602477/endometrial-receptivity-in-the-eutopic-endometrium-of-women-with-endometriosis-it-is-affected-let-me-show-you-why
#15
REVIEW
Bruce A Lessey, J Julie Kim
The endometrium maintains complex controls on proliferation and apoptosis as part of repetitive menstrual cycles that prepare the endometrium for the window of implantation and pregnancy. The reliance on inflammatory mechanisms for both implantation and menstruation creates the opportunity in the setting of endometriosis for establishment of chronic inflammation that is disruptive to endometrial receptivity, causing both infertility and abnormal bleeding. Clinically, there can be little doubt that the endometrium of women with endometriosis is less receptive to embryo implantation, and strong evidence exists to suggest that endometrial changes are associated with decreased cycle fecundity as a result of this disease...
June 8, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28601161/effective-use-of-sexedultra%C3%A2-sex-sorted-semen-for-timed-artificial-insemination-of-beef-heifers
#16
J M Thomas, J W C Locke, R Vishwanath, J B Hall, M R Ellersieck, M F Smith, D J Patterson
An experiment was designed to evaluate the relative fertility of SexedULTRA(TM) sex-sorted semen compared to conventional, non-sex-sorted semen when used among beef heifers in conjunction with split-time AI following the 14-d CIDR-PG protocol. Units of conventional semen were generated with 25.0 × 10(6) live cells per 0.5 ml straw prior to freezing, and units of sex-sorted semen were generated using the SexedULTRA(TM) Genesis III sorting technology with 4.0 × 10(6) live cells per 0.25 ml straw prior to freezing...
August 2017: Theriogenology
https://www.readbyqxmd.com/read/28601159/abnormal-pregnancies-associated-with-deviation-in-progestin-and-estrogen-profiles-in-late-pregnant-mares-a-diagnostic-aid
#17
Mitsumori Shikichi, Katsuroku Iwata, Katsumi Ito, Daisuke Miyakoshi, Harutaka Murase, Fumio Sato, Kenji Korosue, Shunichi Nagata, Yasuo Nambo
Measurement of progestines and estrogens in maternal plasma has been advocated as an indicator of foeto-placental function. The goals of the present study were as follows: to determine progestin and estrogen concentrations in mares with normal and abnormal pregnancies during late gestation, evaluate the diagnostic value of hormone concentrations, and investigate the relationship between hormone concentrations after treatment and the survival of foals. Blood samples were collected monthly from 459 pregnant mares between Day 201 of gestation and foaling...
August 2017: Theriogenology
https://www.readbyqxmd.com/read/28601153/equine-chorionic-gonadotropin-increases-fertility-of-grazing-dairy-cows-that-receive-fixed-time-artificial-insemination-in-the-early-but-not-later-postpartum-period
#18
Alexandre B Prata, Guilherme C S Pontes, Pedro Leopoldo J Monteiro, Jéssica N Drum, Milo C Wiltbank, Roberto Sartori
This study evaluated effects of equine chorionic gonadotropin (eCG) on fertility of 679 crossbred (Bos taurus x Bos indicus) lactating grazing cows synchronized for fixed-time AI (FTAI). At a random day of the estrous cycle cows received an intravaginal progesterone (P4) implant, 2 mg estradiol benzoate (EB) and 100 μg gonadorelin (D0-AM). On D7-AM, cows received 0.5 mg sodium cloprostenol and were randomly assigned into two treatments: eCG (n = 340; 400 IU eCG on D7), or Control (n = 339; no eCG). On D8-PM, P4 implants were removed and cows received 0...
August 2017: Theriogenology
https://www.readbyqxmd.com/read/28601149/cells-expressing-cd4-cd8-mhcii-and-endoglin-in-the-canine-corpus-luteum-of-pregnancy-and-prepartum-activation-of-the-luteal-tnf%C3%AE-system
#19
Renata M Nowaczyk, Ewelina Jursza-Piotrowska, Aykut Gram, Marta J Siemieniuch, Alois Boos, Mariusz P Kowalewski
In the dog, knowledge about involvement of the immune system in controlling luteal function is restricted to observations showing a time-dependent invasion of immune cells into the corpus luteum (CL) of non-pregnant bitches. Therefore, this study investigated the presence of CD4-, CD8-, MHCII- and endoglin-expressing cells in CL collected throughout pregnancy from pre-implantation until prepartum luteolysis. Immunohistochemistry and semi-quantitative RT-PCR were applied. The time-dependent expression of CD4, CD8 and endoglin was more strongly related to formation of the CL, whereas MHCII was induced during luteolysis...
August 2017: Theriogenology
https://www.readbyqxmd.com/read/28601147/deep-anestrous-mares-under-natural-photoperiod-treated-with-recombinant-equine-fsh-refsh-and-lh-relh-have-fertile-ovulations-and-become-pregnant
#20
Geraldine A Meyers-Brown, Meaghan C Loud, John C Hyland, Janet F Roser
The most common equine breeding practice to decrease the time to the first ovulation of the year is to use artificial lights starting December 1 in the Northern Hemisphere. It can take 60-90 d for this lighting regimen to induce a fertile ovulation. The success rate for pharmaceutical compounds to carry out the same process has been variable. One compound that did induce an early ovulation was recombinant equine follicle stimulating hormone (reFSH), but neither pregnancy nor cyclicity was established in that study...
August 2017: Theriogenology
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