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A. P. Banerji, A. K. Dubey, S. Sarkar, and P. N. Shah

Summary. The protein patterns of fetal rat gonads (14½–21½ days of gestation) were examined by SDS gel electrophoresis. Male gonads contained more protein components at all stages.

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S. Sarkar, A. K. Dubey, A. P. Banerji, and P. N. Shah

Summary. The isoenzymes of LDH were detected by polyacrylamide gel electrophoresis. The M and H LDH subunits were present in gonads of both sexes from Day 14½p.c. and there was some variation with increased gestation. From Day 20 after birth two specific LDH-X bands (X1 and X2) were evident in the spermatocyte-rich fraction, but not in those of the Sertoli and Leydig cell fractions or those of the ovary.

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V. Puri, G. F. X. David, A. K. Dubey, C. P. Puri, and T. C. Anand Kumar

Summary. Intranasal administration of norethisterone at a daily dose of 9 μg between Days 5 and 14 of the menstrual cycles blocked ovulation in 10 out of 17 adult female monkeys. Serum concentrations of hormones indicated that ovulation was blocked due to a suppression of the mid-cycle, oestradiol-induced LH surge. Ovarian follicular activity in the treated menstrual cycles was not affected by norethisterone but there was a marked delay in the onset of the mid-cycle oestradiol surge in most of the treated animals. The duration of the menstrual cycle length after the oestradiol peak was significantly reduced in all the treated monkeys, indicative of a shortened luteal phase.