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[Biological process in patients having been impregnated through GIFT or IVF-ET. Clinical experience]

S Carranza Lira¹, A Alvarado Duran, C Serviere Zaragoza

¹Clínica de Reproducción Asistida, Instituto Nacional de Perinatología, Méx, D.F.

Ginecologia Y Obstetricia De Mexico

|October 1, 1993

Abstract:

There were analyzed in a retrospective way the results of pre-retrieval hormonal levels as well as the number of retrieved oocytes, mature oocytes and transferred embryos in three groups of patients (2 GIFT, 1 IVF-ET) which achieved a pregnancy, and were matched with groups with no pregnancy. There were no statistically significant differences in most of the analyzed parameters, by the aforementioned we can suppose that pregnancy depends of endometrial quality and in this moment we are not able to modify it satisfactorily.

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During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...

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