| Literature DB >> 6118339 |
W P Collins, C M Branch, P O Collins, H N Sallam.
Abstract
Entities:
Keywords: Biological Characteristics; Biology; Cervix; Demographic Factors; Fertilization; Implantation; Menstruation; Ovulation; Population; Population Dynamics; Pregnancy; Pregnancy, First Trimester; Reproduction; Spermatozoa; Time Factors
Mesh:
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Year: 1981 PMID: 6118339
Source DB: PubMed Journal: Int J Fertil ISSN: 0020-725X