. M M J J A S MONTHS Text-fig. 44. Relation between month of conception and maternal age. Thin line, mean body length; thick line, resultant; broken line, mean number of corpora. A, all pregnant females; B, multiparous females. in the ' recently ovulated' group from antarctic waters (p. 348). This close agreement suggests that the follicles are not maturing in preparation for a subsequent ovulation, but may be regressing following the current ovulation. It is interesting that three of the recently ovulated females examined at Durban had experienced multiple ovulations. This material, while not
. M M J J A S MONTHS Text-fig. 44. Relation between month of conception and maternal age. Thin line, mean body length; thick line, resultant; broken line, mean number of corpora. A, all pregnant females; B, multiparous females. in the ' recently ovulated' group from antarctic waters (p. 348). This close agreement suggests that the follicles are not maturing in preparation for a subsequent ovulation, but may be regressing following the current ovulation. It is interesting that three of the recently ovulated females examined at Durban had experienced multiple ovulations. This material, while not providing very strong support for the thesis of monoestrous cycles, does not contradict it. The multiparous group may contain some 40 year classes. It has already been mentioned that the ' 3 corpora albicantia' group conceptions tend to be earlier than those of the ' o, 1 and 2 corpora albicantia' groups. One may ask whether individual females tend to conceive at a slightly earlier date each year so that in general the oldest females are the first to ovulate each breeding season. We are in a position to compare the average ages of females conceiving in each month by using corpora
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