on the proportion of colour-marked offspring. Labelling of living spermatozoa with fluorescein isothiocyanate was used to establish the identity of spermatozoa recovered from the female tract and/or associated with eggs following mixed inseminations. Little difference in the proportion of the two sperm populations present in the female tract was apparent 6 hr after insemination but, by 13 hr, t...

There are more than 80 million infertile couples around the world (1). It is estimated that about 40 million of infertile couples are currently seeking infertility treatments (2). Treatment of infertility ranges from simple advice on natural conception to complex and expensive interventions including Assisted Reproductive Technologies (ART) (3). Advanced infertility treatment methods are costly...

Objective: To assess the effect of GnRHa as luteal phase support in women undergoing controlled ovarian stimulation and IUI. Design: A prospective, randomized trial. Setting: Cytogenetic and Endoscopy Unit, Zagazig University Hospital. Methods: Two hundred fourteen women either with unexplained or mild male factor infertility was planned to contribute to this study. After exclusion 18 women, 19...