Results 31 to 40 of about 343,749 (184)

Chromosomal abnormalities predisposing to infertility, testing, and management: a narrative review

Bulletin of the National Research Centre, 2021
Background Much interest has not been placed on the role of chromosomal abnormalities in the pathogenesis and rising prevalence of infertility in recent times.
Tajudeen O. Yahaya, Esther O. Oladele, Daniel Anyebe, Chidiebere Obi, M. D. A. Bunza, Ridwan Sulaiman, Usman U. Liman   +6 more
doaj   +1 more source

Preimplantation genetic diagnosis in patients with male meiotic abnormalities

Reproductive BioMedicine Online, 2004
Indications and candidates for preimplantation genetic diagnosis (PGD) have increased in recent years. This study evaluates whether IVF-intracytoplasmic sperm injection (ICSI) results could be improved by selecting embryos through PGD-AS (aneuploidy screening) in couples in whom the male partner presents meiotic abnormalities. Two hundred and fifty-six
B, Aran, A, Veiga, F, Vidal, M, Parriego, J M, Vendrell, J, Santaló, J, Egozcue, P N, Barri   +7 more
openaire   +2 more sources

Cytomixis and associated meiotic abnormalities affecting pollen fertility in Clematis orientalis

, 2010
Present cytological investigations from the cold desert regions of Lahaul-Spiti and Kinnaur (India) record the first ever tetraploid (2n=32) chromosome count and cytomixis in Clematis orientalis L. var. acutifolia Hook. f. et Thoms.
S. Kaur, V. K. Singhal, D. Kaur, P. Kumar   +3 more
core   +1 more source

Meiotic abnormalities in ‘Jinzhui’.

, 2013
Meiotic abnormalities in ‘Jinzhui’.
Maofu Li (467771), Junkai Wu (467770), Tianzhong Li (230615)   +2 more
core   +1 more source

Reproductive Isolation Between Taxonomically Controversial Forms of the Gray Voles (Microtus, Rodentia; Arvicolinae): Cytological Mechanisms and Taxonomical Implications

Frontiers in Genetics, 2021
The formation of hybrid sterility is an important stage of speciation. The voles of the genus Microtus, which is the most speciose genus of rodents, provide a good model for studying the cytological mechanisms of hybrid sterility.
Tatiana I. Bikchurina, Tatiana I. Bikchurina, Fedor N. Golenishchev, Elena A. Kizilova, Elena A. Kizilova, Ahmad Mahmoudi, Pavel M. Borodin, Pavel M. Borodin   +7 more
doaj   +1 more source

Smooth pursuit and saccadic abnormalities in first-episode schizophrenia. [PDF]

, 1998
Background. Previous studies of oculomotor dysfunction in schizophrenia have tended to concentrate on abnormalities of smooth pursuit eye tracking in chronic medicated patients. We report the results of a study of smooth pursuit, re¯exive and antisaccade
Barnes, T. R. E., Duncan, L.-J., Puri, B. K., Kennard, C., Crawford, Trevor J., Joyce, E. M., Hutton, S.   +6 more
core   +5 more sources

Meiotic behavior during microsporogenesis, responsible for male sterility in some species of Salvia sect. Aethiopis in Iran

Caryologia
The genus Salvia L. (Lamiaceae: tribe Mentheae) contains about 1000 species. Section Aethiopis in this genus has a distribution in the Mediterranean and central Asia and contains about 34 species in Iran.
Fatemeh Hajmoradi
doaj   +1 more source

Cytological analysis for meiotic patterns in wild rice (Oryza rufipogon Griff.)

Biotechnology Reports, 2017
The present report explores the chromosomal patterns during meiosis as a fundamental cell division study in wild rice (Oryza rufipogon Griff.). Cytological assays revealed normal meiosis in most cases but in some instances meiotic abnormalities such as ...
Sutanu Sarkar, Somnath Bhattacharyya, Saikat Gantait   +2 more
doaj   +1 more source

Meiotic abnormalities in patients bearing complete AZFc deletion of Y chromosome [PDF]

Human Reproduction, 2007
We studied meiosis in three infertile patients presenting complete AZFc microdeletion and three controls.Primary spermatocytes were immunolabeled with SCP3, BRCA1 and gammaH2AX. We quantified the leptotene, zygotene and pachytene stages, and pachytene abnormalities: asynapsis and fragmented and dotted synaptonemal complexes (SCs).SCP3 level was ...
C, Geoffroy-Siraudin, I, Aknin-Seiffer, C, Metzler-Guillemain, R, Ghalamoun-Slaimi, M F, Bonzi, R, Levy, M R, Guichaoua   +6 more
openaire   +2 more sources

Insular volume abnormalities associated with different transition probabilities to psychosis [PDF]

, 2011
Background Although individuals vulnerable to psychosis show brain volumetric abnormalities, structural alterations underlying different probabilities for later transition are unknown.
McGuire, P., A. Riecher-Rössler, Simon, A., Simon, A, P. Fusar-Poli, Lenz, C., Fusar-Poli P., Riecher-Rössler, A., Bendfeldt, K, Stieglitz, R D, Riecher-Rössler, A, S. J. Borgwardt, McGuire, P, Borgwardt, S. J., J. Aston, Smieskova R., Bendfeldt K., Lenz C., Smieskova, R., Borgwardt, S J, Riecher-Rossler A., R. Smieskova, Riecher-Roessler, A., P. McGuire, Fusar-Poli, P, Simon A., A. Simon, Borgwardt S. J., K. Bendfeldt, Aston, J, Bendfeldt, K., Stieglitz, R. -D., Lenz, C, Stieglitz R. -D., Stieglitz, R.-D., R.-D. Stieglitz, Fusar-Poli, P., Aston J., McGuire P., Fusar-Poli, P.; id_orcid, Smieskova, R, C. Lenz, Aston, J.   +42 more
core   +2 more sources