Comparative cytogenetical and morphological studies in ovarian dysgenesis

Comparative cytogenetical and morphological studies in ovarian dysgenesis.

In 14 cases of the Turner syndrome and pure gonadal dysgenesis streak gonads were studied histologically. In cases where the 46,XX line was unimpaired the blood vessels of the gonad showed severe degeneration in at least 30 to 50%. These streak gonads usually contained some of the characteristic ovarian elements as well as the vascular lesions. In gonosomal monosomy, on the other hand, a simila...

Hybrid Dysgenesis in DROSOPHILA MELANOGASTER: Morphological and Cytological Studies of Ovarian Dysgenesis.

A type of intraspecific hybrid sterility, between two strains of Drosophila melanogaster, referred to as GD (gonadal dysgenesis) sterility, is observed when females from a type of strain called M are crossed with males from a second type called P. Absence of egg-laying is characteristic of female GD sterility and its manifestation is conditional on high developmental temperatures. Morphological...

Cytogenetical studies on swine intersexes.

Cytogenetical studies in five Atlantic Anguilliformes fishes

The order Anguilliformes comprises 15 families, 141 genera and 791 fish species. Eight families had at least one karyotyped species, with a prevalence of 2n = 38 chromosomes and high fundamental numbers (FN). The only exception to this pattern is the family Muraenidae, in which the eight species analyzed presented 2n = 42 chromosomes. Despite of the large number of Anguilliformes species, karyo...

Gynaecography in premature ovarian failure and ovarian dysgenesis.

Gynaecography-the radiological visualization of the internal female genitalia after pneumoperitoneum-is a safe and simple procedure. When taken in conjunction with the clinical and laboratory findings the results of gynaecography are often a sufficient basis for diagnosis and a plan of management in women presenting with menstrual irregularity or infertility.