出典:国際連合
Conception 1 results from the fertilization 2 of an ovum 3 by a spermatozoon 4 or sperm cell 4 and marks the beginning of pregnancy 5 or gestation 5 for the impregnated woman. In the course of its development the product of conception 6 is successively called an embryo 7 and then a foetus 7 — sometimes written as fetus 7. The moment at which the embryo becomes a foetus is not precisely determined: certain scientists set it at the end of 12 weeks or three months of intra—uterine life, although successive developmental stages after the eighth week are often termed foetal. Nidation 8 refers to the implantation of the egg in the wall of the uterus 9 or womb 9, a process which occurs a few days after fertilization.
出典:Wiktionary
出典:『Wiktionary』 (2026/03/05 19:50 UTC 版)
From 中期英語 sperme, from Latin sperma, from Ancient Greek σπέρμα (spérma, “seed, semen”). Compare also Old French esperme, sparme.
sperm (countable and uncountable, plural sperm or sperms)
sperm (third-person singular simple present sperms, present participle sperming, simple past and past participle spermed)
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