Embryology LMRFC –Revision Session

Oocyte+ Sperm Fertilization Zygote Morula Blastocyst Cleavage Compaction

A-Pre-embryonic B-Embryonic C-Foetal Pregnancy weeks calculated from date of Last Menstrual Period i.e. conception weeks +2, so term is 40 pregnancy weeks

Totipotent ANY cell type – “Total human” Pluripotent Many cell type – “plural” Compaction

Implantation conceptus now has 107 cells Day7 -8 will make the embryo - 99 development of the fetal membranes

Where does fertilisation occur? Where is the ideal site for Implantation? Ampulla of Fallopian tube High on the posterior Uterine wall

week 2 – “the week of twos”