All oogenia are transformed into primary oocytes (begin 1st
meiotic division) before... Correct Answers birth
Blastocyte Correct Answers formation occurs after morula,
enters in uterus at end of first week
Blastomere Correct Answers type of cell produced by
cleavage, roughly 30 hours after fertilization, not tightly bound;
daughter cells
Cleavage Correct Answers repeated mitotic divisions of the
zygote resulting in rapid increase of number of cells
Completion of first meiotic division of oogenesis occurs
Correct Answers shortly before ovulation
decidua basalis Correct Answers the maternal part of the
placenta is formed by
Dizygotic Twins (DZ) Correct Answers twins that originate
from 2 zygotes
embryonic disc does not divide completely or adjacent
embryonic discs fuse Correct Answers Cause of conjoined
twins
end of the 4th week Correct Answers a complex vascular
network is established in the placenta by the
, fetal hypoxia and intrauterine growth restriction Correct
Answers reductions in uteroplacental circulation result in
Follicular development Correct Answers development of
ovarian follicle
Gametes Correct Answers oocytes/ sperm
Gametes are what type of cells? Correct Answers Haploid cells
Gametogenesis Correct Answers process of formation and
development of gametes (egg/sperm)
haploid cells Correct Answers cells that have half the number
of chromosomes
Homeobox genes (HLX and DLX3) Correct Answers genes
that are expressed in the trophoblast and regulate placental
development
Implantation Correct Answers blastocyst burrows into and
embeds within the endometrium; appx 6 days after fertilization
Inner cell mass Correct Answers type of cell in blastocyte
which forms embryo
Luteinizing hormone Correct Answers serves as trigger for
ovulation (release of secondary oocyte)
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