| gestational a. |
age of conceptus or pregnancy. In human clinical practice, pregnancy is timed from onset of the last normal menstruation. Elsewhere the onset may be timed from estrus, coitus, artificial insemination, vaginal plug formation, fertilization, or implantation.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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