| 释义 |
conceptus, n.|kənˈsɛptəs|
Pl. conceptuses.
[a. L. conceptus conception, embryo, f. conceptus pa. pple. of concipĕre to conceive v.]
The product of conception, i.e. the union of sperm and egg, esp. in the early stages of pregnancy; a fertilized egg before implantation; an embryo or foetus together with the placenta, amniotic fluid, and other products of conception. Also, an embryo, esp. a newly conceived one.
1745R. James Medicinal Dict. II, Conceptus, the very first Rudiments of the Fœtus in the Uterus after Conception. 1833Dunglison Dict. Med. Sci. I. 221/2 Conceptus, the first rudiments of the fœtus, after conception. 1942Amer. Jrnl. Obstetr. & Gynecol. XLIV. 979 Study of these two conceptuses indicates that contact with the endometrium may be established as early as the fifth or sixth postovulatory day. 1970Sci. Jrnl. June 75/1 Each newly conceived embryo, or conceptus, is genetically different from the mother's tissues in which it grows. 1979J. Macquarrie Immaculate Conception (Ecumenical Soc. B.V.M.) 3 We still argue over the question of when a human person comes into being—is it at conception.., or is it only after the implanting of the conceptus in the wall of the womb? 1989New Scientist 9 Dec. 39/2 To develop successfully, a conceptus (or pre-embryo) must acquire certain genes from its mother's chromosomes via the egg. |