This paper summarizes research dealing with the induction of spontaneous superovulation in the cyclic hamster by single injections of PMSG. Four principal approaches have been used : 1) ovulation rate as an endpoint ; 2) number and size of follicles, and staging of follicular development in serially sectioned ovaries ; 3) determining the effects of an antiserum to PMSG ; 4) measuring steroid an...

Purpose: to evaluate the effect of previous ovarian surgery for endometriosis on the ovarian response in assisted reproduction treatment cycles and its pregnancy outcome. Methods: a total of 61 women, with primary infertility and previous ovarian surgery for endometriosis, submitted to 74 in vitro fertilization/intracytoplasmic spermatozoid injection (IVF/ICSI) cycles, were studied (study group...

Rat oocytes can be produced artificially by superovulation. Because some strains show low sensitivity to superovulation treatment, in vitro maturation is an alternative method to produce numerous matured oocytes. Furthermore, establishment of an in vitro maturation system with simple culture conditions is cost effective and leads to easy handling of oocytes. This study examined developmental ab...

Assisted reproductive technologies (ART) are associated with several complications including low birth weight, abnormal placentation and increased risk for rare imprinting disorders. Indeed, experimental studies demonstrate ART procedures independent of existing infertility induce epigenetic perturbations in the embryo and extraembryonic tissues. To test the hypothesis that these epigenetic per...

Synchronization and superovulation are commonly used to obtain large numbers of embryos for experimental and practical purposes. This study compared the number, quality, and in vitro development of embryos recovered from gilts following single or double estrus synchronization and superovulation. Prepubertal gilts from the single synchronization group were injected with 1500 I.U. PMSG and 1000 I...

such as pregnant mare serum gonadotropin (PMSG) and human menopausal gonadotropin (hMG) is a well-established practical technique. The purpose of this technique is to achieve enhanced commercial production of genetically meritorious individuals in the livestock industry, to retrieve a number of oocytes and early embryos in various research fields including genetic engineering, and to treat medi...

Forced ovulation induced by the administration of exogenous gonadotropin is a useful marker for studying the ovarian toxicity of chemicals in experimental animals. We examined the toxicity of di-(2-ethylhexyl) phthalate (DEHP) in the ovaries of immature F344 female rats. Superovulation was induced by injections of equine chorionic gonadotropin (eCG) and human chorionic gonadotropin (hCG) in rat...

The article reviews aspects of the basic reproductive biology of the camel, such as puberty, breeding season, ovarian dynamics, synchronisation of ovarian activity and artificial insemination, and superovulation and embryo transfer. Pregnancy and parturition are also discussed.

background: retinoids have been suggested to play a role in oogenesis and oocyte survival. objective: in the present study the effects of retinol palmitate were investigated on differential follicular counts in response to superovulation as well as follicle quality after vitrification of ovaries. materials and methods: ten, 4 week old female balb/c mice were randomly assigned to either paraffin...