Results 181 to 190 of about 4,887 (219)

Results of Varicocelectomy in Patients with Isolated Teratozoospermia

Urologia Internationalis, 2008
<i>Introduction:</i> Isolated teratozoospermia is rarely encountered in patients with clinically palpable varicocele, and the consequences of varicocelectomy remain unclear in these cases. In the current study, we assessed the effect of varicocelectomy on sperm morphology in a series of patients with infertility.
Murat, Cakan, Hasan, Bakirtas, Mustafa, Aldemir, Fuat, Demirel, Uğur, Altug   +4 more
openaire   +2 more sources

Teratozoospermia and in-vitro fertilization: a randomized prospective study

Human Reproduction, 1994
A prospective randomized study was conducted to assess the prognostic value of sperm morphology in an in-vitro fertilization (IVF) programme, using strict criteria. The first group (T, teratozoospermic) included 32 couples with an isolated teratozoospermia in the male partner (morphology < 9% normal).
W, Ombelet, F L, Fourie, H, Vandeput, E, Bosmans, A, Cox, M, Janssen, T, Kruger   +6 more
openaire   +2 more sources

Isolated teratozoospermia: is there a role for antioxidant therapy?

Urologiia, 2017
Recently, literature has emerged that offers contradictory findings of idiopathic forms of isolated teratozoospermia that may confuse clinicians. Some researchers argue that at 0-1% of normal forms of spermatozoa, morphology itself cannot be a prognostic indicator of fertility, either in the planning of natural pregnancy, or when used in assisted ...
E A, Efremov, E V, Kasatonova, Ya I, Melnik, A A, Nikushina   +3 more
openaire   +2 more sources

Expression of NOX5 in human teratozoospermia compared to normozoospermia

Andrologia, 2012
Spermatozoa are capable of producing small amounts of reactive oxygen species (ROS), and sperm in teratozoospermia generate more ROS than sperm in normozoospermia. The source of ROS production in ejaculated human sperm has not been fully clarified.
E, Ghani, S, Keshtgar, M, Habibagahi, A, Ghannadi, M, Kazeroni   +4 more
openaire   +2 more sources

Teratozoospermia and asthenozoospermia are associated with specific epigenetic signatures

Andrology, 2016
Semen analysis is commonly used as a tool to assess the fertility potential of a male, despite its relatively low predictive power. In this study, we have assessed associations between semen analysis findings (low count, low motility, low viability, poor sperm penetration assay results, poor morphology, and increased DNA damage) and DNA methylation ...
T G, Jenkins, K I, Aston, J M, Hotaling, M B, Shamsi, L, Simon, D T, Carrell   +5 more
openaire   +2 more sources

[Genetic aspects of the teratozoospermia].

Gynecologie, obstetrique & fertilite, 2009
Recent mutation identification in well-known sperm defects gives proof that there are genetic causes of infertility. Familial forms and some features of the spermograms lead toward the genetic origin of these syndromes. For each syndrome, several clinical aspects and partial forms were described.
M-R, Guichaoua, C, Geoffroy-Siraudin, G, Mercier, V, Achard, O, Paulmyer-Lacroix, C, Metzler-Guillemain   +5 more
openaire   +1 more source

A Cascade of epistatic interactions regulating teratozoospermia in mice

Mammalian Genome, 2015
Infertility in humans and subfertility in domestic animals are two major reproductive problems. Among human couples, ~15% are diagnosed as infertile, and males are considered responsible in about 50% of the cases. To examine male fertility, various sperm tests including analyses of sperm morphology, sperm count and sperm mobility are usually performed.
Keitaro, Hirawatari, Naoto, Hanzawa, Ikuo, Miura, Shigeharu, Wakana, Hideo, Gotoh   +4 more
openaire   +2 more sources

[Molecular genetic mechanisms of teratozoospermia].

Zhonghua nan ke xue = National journal of andrology, 2014
Teratozoospermia is one of the important factors contributing to male infertility, and its pathogenesis is not yet clear. Recent years have witnessed some progress in the researches on sperm morphology, and some genes have been confirmed to be correlated with spermatogenesis.
Rui-Zhi, Liu, Jing, Wu, Rui-Xue, Wang
openaire   +1 more source

High Seminal Sialic Acid Concentrations in Patients with Severe Teratozoospermia

Archives of Andrology, 1992
Seminal plasma and sperm-bound sialic acid (SA) concentrations were evaluated in patients with severe teratozoospermia (less than 5% morphologically normal sperm) and correlated with values of a control group with greater than 20% morphologically normal sperm.
D, du Toit, M S, Bornman, M P, van der Merwe, D J, du Plessis   +3 more
openaire   +2 more sources

Artificial oocyte activation in severe teratozoospermia undergoing intracytoplasmic sperm injection

Fertility and Sterility, 2008
To evaluate efficiency of ionomycin on fertilization and cleavage rates, embryo development, and pregnancy rate after intracytoplasmic sperm injection (ICSI) in teratozoospermic patients.Laboratory study.Isfahan fertility and infertility Center, and Royan institute, Tehran, Iran.Eighty-seven couples with male factor etiology (severe teratozoospermia ...
Mohammad H, Nasr-Esfahani, Shahnaz, Razavi, Zeinab, Javdan, Marzeyeh, Tavalaee   +3 more
openaire   +2 more sources