in Reproduction


Eight hundred and fifty-five 2- to 5-day-old ova were transferred from donor rats into the uterine horns of recipient rats on the 2nd through the 6th days of pseudopregnancy. The objective was to establish the lower, optimal and upper limits of development of both ovum and endometrium which were compatible with normal pregnancy. The lower and upper limits of development, 2 and 5 days respectively, proved to be the same for both ovum and endometrium. There was a striking tendency for ova the same age as, or one day older than, the corresponding stage of uterine development to survive more often than ova one day younger than the stage of uterine development. Data previously reported for the rabbit, mouse, and sheep suggest that ovular maturity may be of prime importance to implantation and survival of ova in these species also.

If the inline PDF is not rendering correctly, you can download the PDF file here.


     An official journal of

    Society for Reproduction and Fertility


Sept 2018 onwards Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 91 17 1
PDF Downloads 89 30 2