Results 201 to 210 of about 46,526 (241)

Fertilization failure assay identifies stage-specific arrests in couples with total fertilization failure

Molecular Human Reproduction
Abstract Fertilization is the process by which sperm and oocyte recognize each other and fuse to form a zygote. Fertilization failure is a common issue encountered in ART. However, clinically, there is a lack of identification of the specific stage at which fertilization is arrested and the development of personalized improvement ...
Jing Dai, Yueren Wu, Jianfang Che, Shuoping Zhang, Yifan Gu, Fei Gong, Can Dai, Ge Lin   +7 more
openaire   +2 more sources

The predictive value of idiopathic failure to fertilize on the first in vitro fertilization attempt

Fertility and Sterility, 1991
To investigate the subsequent performance of patients with idiopathic fertilization failure on the first in vitro fertilization (IVF) cycle.A retrospective study of 2,322 consecutive patients undergoing their initial IVF cycle.Advanced infertility treatment in an IVF/general infertility clinic.In 5 years, 94 couples with unexplained failed oocyte ...
D, Molloy, K, Harrison, T, Breen, J, Hennessey   +3 more
openaire   +2 more sources

Failure to preserve fertility in patients with Hodgkin's disease

Cancer Chemotherapy and Pharmacology, 1987
The hypothesis that the "down-regulated" gonad is less vulnerable to the effects of cytotoxic chemotherapy for advanced Hodgkin's disease has been investigated. Thirty men and eighteen women were randomly allocated to receive an agonist analogue of gonadotrophin-releasing hormone prior to, and for the duration of, cytotoxic chemotherapy.
J.H. Waxman, R. Ahmed, D. Smith, P.F.M. Wrigley, W. Gregory, S. Shalet, D. Crowther, L.H. Rees, G.M. Besser, J.S. Malpas, T.A. Lister   +10 more
openaire   +2 more sources

The impact on fertility of contraceptive failure in China in the 1980s

Journal of Biosocial Science, 1995
SummaryContraceptive failure was an important determinant of fertility in China in the 1980s. Based on the data from the China Two-per-Thousand Fertility Survey, this study shows that about 7% of the general fertility rate of currently married women aged 15–49 for a 12-month period is attributed to contraceptive failure, mainly due to the high failure ...
D, Wang, I, Diamond
openaire   +2 more sources

Cytologic investigation of human in vitro fertilization failures

Fertility and Sterility, 1985
A cytogenetic study of unsuccessfully fertilized oocytes was done for information on the frequency and type of chromosomal abnormalities leading to preimplantation loss. Of 72 oocytes, 44 were assessed as mature, 19 as intermediate, and 9 as immature. The mean fertilization rate was 68%.
M T, Zenzes, L, Belkien, J, Bordt, I, Kan, H P, Schneider, E, Nieschlag   +5 more
openaire   +2 more sources

Defective sperm decondensation: a cause for fertilization failure

Andrologia, 2002
The study aimed to evaluate the role of chromatin packaging (CMA3 staining), sperm morphology during sperm-zona binding, sperm decondensation and the presence of polar bodies in oocytes that failed in vitro fertilization (IVF). The percentage CMA3 staining categorized the data into three groups, < 44%, n = 10; > or = 44-59%, n = 10; and > or = 60%, n =
Esterhuizen A.D., Franken D.R., Becker P.J., Lourens J.G.H., Muller I.I., Van Rooyen L.H.   +5 more
openaire   +3 more sources

Fertility, Education, and Market Failures [PDF]

Journal of African Development, 2002
We show that coordination failures may be part of an explanation for the demographic differences between rich and poor countries and their differing attitudes towards the use of child labor. Our analysis is carried out within a two-period, general equilibrium model with endogenous fertility, parental investment in children's education and firms ...
Sylvain Dessy, Stephane Pallage
openaire   +1 more source

Fertilization failure in IVF: why and what next?

Human Reproduction, 1990
Among 297 couples who underwent 587 oocyte collection procedures, 95 (16%) total fertilization failures (FF) were observed. This frequency is similar in couples with either normal or only mildly deficient spermatozoa (16.2 and 13.7% respectively) but is almost doubled in cases of moderately and severely defective sperm (26.5%).
Barlow, Patricia, Englert, Yvon, Puissant, Françoise, Lejeune, Bernard, Delvigne, Annick, Van Rysselberge, Michel, Leroy, Fernand   +6 more
openaire   +3 more sources

Cytogenetic analysis of in vitro fertilization (IVF) failures

Human Genetics, 1989
Cytogenetic studies were carried out on 150 oocytes obtained in a human in vitro fertilization (IVF) program. Although all cells lacked signs of fertilization at light microscopy, 46 (30.7%) appeared to show cytological evidence of fertilization.
M H, Pieters, J P, Geraedts, J C, Dumoulin, J L, Evers, M, Bras, F H, Kornips, P P, Menheere   +6 more
openaire   +2 more sources

[Fertilization failure in IVF and ICSI].

Journal de gynecologie, obstetrique et biologie de la reproduction, 2015
To assess male and female clinical and biological parameters that may explain fertilization failure in vitro fertilization (IVF) and IVF with intra-cytoplasmic sperm injection (ICSI).Retrospective case-control study including 1282 IVF or ICSI cycles at the centre hospitalier universitaire of Nantes from September 2010 to February 2012.
A-S, Peultier, T, Fréour, N, Cazenave, P, Barrière   +3 more
openaire   +1 more source