Deferred nidation of the blastocyst, with reference to the length of gestation.
D001755:Blastocyst; D010064:Embryo Implantation; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian; D005260:Female; D006801:Humans; D011247:Pregnancy
EMBRYO; PREGNANCY