[Daily variations in plasma somatotropin in the lactating or dry goat].

In lactating goats, manual milking, feeding and certain conditions depending on milking routine may increase plasma growth hormone during day time. Growth hormone basal levels were higher in lactating goats than in dry goats. Statistical difference between the means was highly significant.

[The effect of gonadotropic hormones and the fetal hypophysis on testosterone production by the testis of 18 day mouse fetuses in organ culture].

The production of testosterone (measured by radioimmuno-assay) by the 18-day-old mouse fetal testis may be stimulated specifically by ovine LH (1 ng, p less than 0.005) and HCG in organ culture. A stimulation by FSH is observed only with high doses (10 mug, p less than 0.

[Effects of milking on plasma levels of somatotropic hormone in sheep and goats].

Growth hormone is released after hand-milking in the Ewe and in the Goat. Species, individual and diurnal variations are observed as well as during the lactation period.