Reproductive Cycle of the California Leaf-Nosed Bat, Macrotus californicus

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Science  18 May 1962:
Vol. 136, Issue 3516, pp. 645-646
DOI: 10.1126/science.136.3516.645


Spermatogenesis is limited to summer and fall, and females are inseminated during the fall concurrent with ovulation and fertilization. While most of the embryonic development is deferred until March, there is slow growth of embryo and placenta during the winter. This sequence is termed "delayed development." Birth is in June, and the young bats are able to join the forage flights by August.