Results 91 to 100 of about 665,097 (197)

Evaluation of Ovarian Stimulation Initiated From the Late Follicular Phase Using Human Menopausal Gonadotropin Alone in Normal-Ovulatory Women for Treatment of Infertility: A Retrospective Cohort Study

Frontiers in Endocrinology, 2019
Objective: To investigate the feasibility of ovarian stimulation initiated in the late follicular phase using human menopausal gonadotropin (hMG) alone in ovulatory patients undergoing in vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI ...
Xiuxian Zhu, Yonglun Fu
doaj   +1 more source

Transcriptional effect of the LH surge in bovine granulosa cells during the peri-ovulation period

, 2011
The LH surge induces a multitude of events that are essential for ovulation and corpus luteum formation. The transcriptional responses to the LH surge of preovulatory granulosa cells (GCs) are complex and still poorly understood.
Marc-André Sirard, Claude Robert, Steph Dieleman, Patrick Blondin, Isabelle Gilbert   +4 more
core   +1 more source

Effects of Letrozole in Prevention of Premature Luteinizing Hormone (LH) Surge in Infertile Women with Clomiphene Citrate Resistant Polycystic Ovary Syndrome (PCOS) Undergoing Intrauterine Insemination

Galen Medical Journal, 2015
Background: Polycystic ovarian syndrome (PCOS) is among the important causes of infertility in young women. Premature luteinizing hormone (LH) surge (PLS) is one of its complications. PLS can reduce the quality of oocytes and therefore decrease the success of intrauterine insemination (IUI).
Afsoon Zarei, Tahere Bahrami Shabahrami, Nasrin Dadras   +2 more
openaire   +2 more sources

The two populations of kisspeptin neurons are involved in the ram induced LH pulsatile secretion and LH surge in anestrous ewes

, 2017
The two populations of kisspeptin neurons are involved in the ram induced LH pulsatile secretion and LH surge in anestrous ...
Lomet, Didier, Ohkura, S., Lasserre, Olivier, Laurence Dufourny, Millar, Robert, Olivier Lasserre, Stephanie Martinet, Didier Lomet, Martinet, Stéphanie, Suetomi, Y, Ghenim, Myriam S., Dufourny, Laurence, Millar, R.P., Yuta Suetomi, Meriem Ghenim, Robert P Millar, Satoshi Ohkura, Ghenim, Meriem, Cognie, Juliette, Juliette Cognié, Claude Fabre-Nys, Suetomi, Yuta, Fabre-Nys, Claude, Ohkura, Satoshi   +23 more
core   +1 more source

KNDy neurone activation prior to the LH surge of the ewe is disrupted by LPS [PDF]

, 2017
In the ewe, steroid hormones act on the hypothalamic arcuate nucleus (ARC) to initiate the GnRH/LH surge. Within the ARC, steroid signal transduction may be mediated by estrogen receptive dopamine-, ß-endorphin- or neuropeptide Y (NPY)-expressing cells ...
D N Jones, H Dobson, Smith, RF, L C Pickavance, Fergani, C, Dobson, H, Pickavance, LC, C Fergani, J E Routly, R F Smith, Routly, JE, Jones, DN   +11 more
core   +1 more source

A STUDY ON THE EFFECTIVENESS OF CLOMIPHENE CITRATE IN COMPARISON TO GNRH ANTAGONIST IN PREVENTING LH SURGE AMONG PATIENTS UNDERGOING OVULATION INDUCTION IN IVF-ICSI

Sanamed, 2018
Objective: To determine the efficacy of clomiphene citrate (CC) in preventing luteinizing hormone (LH) surge without adding gonadotropin releasing hormone (GnRH) antagonist or GnRH agonist in stimulated first fresh intracytoplasmic sperm injection cycle ...
Shiuan Yee Tan, Salleha Khalid, Mohamad Azrai Abu, Abdul Kadir Abdul Karim, Mohd Hashim Omar   +4 more
doaj   +1 more source

Conditional Oprk1-dependent Kiss1 deletion in kisspeptin neurons caused estrogen-dependent LH pulse disruption and LH surge attenuation in female rats

, 2023
The gonadotropin-releasing hormone (GnRH) pulse and surge are considered to be generated by arcuate kisspeptin/neurokinin B/dynorphin A (KNDy) neurons and anteroventral periventricular nucleus (AVPV) kisspeptin neurons, respectively, in female rodents ...
Hiroko Tsukamura, Nao Matsunaga, Marina Takizawa, Masumi Hirabayashi, Koki Yamada, Hitomi Tsuchida, Naoko Inoue, Sena Matsuzaki, Mayuko Nagae, Mari Kometani, Miku Nonogaki, Yoshihisa Uenoyama, Yuki Enomoto, Arvinda Panthee   +13 more
core   +1 more source

Additional file 1: of Decrease in preovulatory serum estradiol is a valuable marker for predicting premature ovulation in natural/unstimulated in vitro fertilization cycle

, 2018
Supplementary information. Figure S1. The process of natural/unstimulated cycles. OPU: ovum pick-up. Figure S2. Flow chart of patients for the study. OPU: ovum pick-up; n: number. Figure S3. The premature ovulation rate in the group with E2>10% increase,
Ling Wu (151826), Yonglun Fu (736113), Qifeng Lyu (736115), Qianqian Zhu (48100), Qiuju Chen (744988), Hui Tian (322212), Renfei Cai (5677358), Shuzin Khor (6002117), Xuefeng Lu (220197), Lihua Sun (295558), Yun Wang (32846), Yanping Kuang (736116)   +11 more
core   +1 more source

LH subunit mRNA concentrations during LH surge in ovariectomized estradiol-replaced rats

, 1988
In cycling rats, pituitary concentrations of luteinizing hormone (LH) beta-subunit mRNA increase two- to threefold before the afternoon proestrus LH surge without a corresponding increase in alpha-subunit mRNA.
M. L. Jameel, S. Papavasiliou, C. Dee, G. A. Ortolano, M. R. el-Gewely, A. L. Barkan, S. M. Zmeili, J. C. Marshall, D. J. Haisenleder   +8 more
core   +1 more source

Ovarian sensitivity index affects clinical pregnancy and live birth rates in gonadotropin-releasing hormone agonist and antagonist in vitro fertilization cycles

Frontiers in Endocrinology
ObjectivesThis study aimed to investigate the correlation of ovarian sensitivity index (OSI) and clinical parameters in IVF treatments.MethodsIVF data files between January 2011 and December 2020 in a single unit were included.
Chao Chin Hsu, Chao Chin Hsu, Isabel Hsu, Sonam Dorjee, Yi Chun Chen, Tzu Ning Chen, Yu Lin Chuang   +6 more
doaj   +1 more source