Development of mouse embryos after ultracentrifugation at the pronuclei stage

SCOPUS: NotDefined.jinfo:eu-repo/semantics/publishe

The fate of the second twin

SCOPUS: cp.jinfo:eu-repo/semantics/publishe

A reappraisal of perinatal mortality factors in twins

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Viability of in vitro-developed human embryos.

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Effects on mature mouse oocytes of ultrasound treatment applied before in vitro fertilisation

Although ultrasound is becoming widely used for monitoring follicular maturation and for oocyte recovery in IVF, there is still need for information about its possible effects on fertilisation, development and even implantation. In this paper, we report our findings on the effect on ovulated mouse oocytes of low-power ultrasound applied before IVF, culture and transfer. Pulse ultrasound was delivered at 3.5 MHz for one hour by a transducer with an average power output of 4.32 mW/cm2, to recently ovulated mouse oocytes. IVF and culture were performed in Whittingham's T6 medium supplemented with bovine serum albumin. No difference was observed between control and sonicated eggs in terms of developmental rate and speed. After 102 h. of culture, expanded blastocysts (75% in both group) were transferred to recipient females which were at day 3 of pseudopregnancy. These animals were autopsied at day 15. Although overall rates of implantation did not differ, there was a statistically significant increase of the number of resorption sites in the ultrasound-treated group (p < 0.01). It is surprising that the deleterious effect of ultrasound should be so much delayed.SCOPUS: NotDefined.jinfo:eu-repo/semantics/publishe

Some aspects of multiple pregnancy after in vitro fertilization and embryon transfer

info:eu-repo/semantics/nonPublishe

Factors leading to tripronucleate eggs during human in-vitro fertilization

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Clinical study on embryo transfer after human in vitro fertilization

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

A comparison between multiple and single pregnancies obtained by in-vitro fertilization

Thirty-eight single and 10 multiple pregnancies obtained after in-vitro fertilization were compared. In the group of multiple gestations, maternal age was lower and the amounts of ovulatory drugs given were significantly smaller than in relation to single pregnancies. All multiple pregnancies arose from triple embryo transfers and the embryos from this group exhibited significantly higher vitality scores. In both groups, plasma levels of oestradiol and progesterone followed the same pattern until day 8 after oocyte retrieval. Following implantation, the secretion of these hormones increased more rapidly in multiple pregnancies pointing at greater luteal activity in this group. HCG levels became significantly higher in multiple gestation on day 25 after oocyte collection. Echographic examination showed that, compared to normal pregnancy, growth in both groups of IVF conceptuses was initially retarded but caught up with normal evolution at ~ 30 days after egg retrieval. The need for adjusting the number of embryos transferred not only to expected success rates but also to the risk of high rank multiples is emphasized.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

LA CRYPTOTETANIE, UN SYNDROME IMPORTANT A DIAGNOSTIQUER ET A TRAITER EN PRATIQUE MEDICALE QUOTIDIENNE

The cryptotetany is a state of hyperexcitability of muscle and nerve. EMG is a good method of diagnosis but physical examination and biological analysis are of poor value. Results of an inquiry over a rural population shows the interest of diagnosis and treatment of this syndrome for the physician.SCOPUS: ar.jinfo:eu-repo/semantics/publishe