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Early Embryogenesis & Maternal Recognition of Pregnancy - Coggle…
Early Embryogenesis & Maternal Recognition of Pregnancy
Steps before embryo attaches to uterus
Hatching of blastocyst from zona pellucida
Maternal recognition of pregnancy
Occurs prior to luteolysis
Pregnancy requires maintenance of high progesterone
Development within the confines of the zona pellucida
Formation of extraembryonic membranes
Preattachment development of embryo
Ootid
Zygote
2 celled embryo
4-8 cells
Morula
Early blastocyst
Hatching blastocyst
2 more items...
Inner cell mass
1 more item...
Trophoblastic cells
1 more item...
Early embryo when blastomeres can't be counted
Totipotent
Terms
Embryo
Organisms in early stages of development
Not able to identify species
Fetus
Potential offspring within uterus
Species is identifiable
Conceptus
Product of conception
Embryo and extraembryonic membranes
Preimplantation stage
Fetus and placenta
Post attachment phase
Embryo
Early embryonic stage
Ootid
Male and female pronuclei observed in cell
Development of extraembryonic membranes
Chorion
Attach to uterus
Amnion
Provide fluid filled protective sac for fetus
Yolk sac
Primitive germ cells
Allantois
Fluid filled sac that collects waste from embryo
Fuses with chorion
Allantochorion
Fetal contribution to placenta
4 membranes
Endoderm
Yolk sac
Mesoderm
Trophoblast
Chorion and amnion
Embryo
Embryo Transfer
Advantages
Assisted reproduction for infertility in humans
Enhanced reproductive potential of endangered species
Enhanced generation of offspring in monotocous species
Enhanced genetic diversity across a wide geographical region
Circumvention of seasonal reproduction
Successful transfer requires
AI of donor female
Recovery of embryos from donor
Surgically exposing ovary and aspirating follicles
Nonsurgically aspirating follicles utilizing ultrasound
Aspirating follicles postmortem in an abattoir
Superovulation of donor
Treatment of FSH to increase number of oocytes
Maintenance of viable embryos in vitro
Synchronizing cycles of donors and recipients
Transfer of embryos to recipient females
