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  • Author: P. K. Basrur x
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P. K. BASRUR and H. KANAGAWA

Summary.

Anatomical and histological examinations on three intersex pigs revealed that two of these carried bilateral ovotestes, well-developed uterine horns and female-like external genitalia, while the third had rudimentary male accessory sex glands and unequal uterine horns with an ovary attached to the right horn and a testis to the left. Chromosome analyses on blood and testicular tissue of the female-like intersexes showed exclusively XX cells whereas the intersex with male accessory sex glands exhibited a small proportion of XY cells in cultures of blood, testis and kidney, suggesting that the latter may be a whole body chimera. In contrast to these cattle freemartins, intersex pigs, including the two with ovotestes, carried apparently functional ovaries. The escape from virilization of the female gonads, despite their proximity to testes in intersex pigs, may be attributable to the biological nature of the testicular secretion which, in boars, is rich in sulphated oestrogens.

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T. A. Bongso, P. K. Basrur and E. V. YoungLai

Summary.

The testosterone concentration in allantoic fluid between 90 and 150 days of gestation in cattle can be used to determine the fetal sex; values were 442±20·3 (S.E.M.) pg testosterone/ml for male fetuses and 215±8·2 pg/ml for female fetuses.