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Home > All Images > 1990 > August > 22 Aug 1990

Images Dated 22nd August 1990

Choose from 15 pictures in our Images Dated 22nd August 1990 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

LM of hatching blastocyst in IVF Featured 22 Aug 1990 Print

LM of hatching blastocyst in IVF

Light micrograph showing a hatching blastocyst, a six days-old human embryo. The blastocyst (left) at six days post-fertilisation is a hollow ball of cells with a fluid centre. Most of these cells will form the placenta & membranes, & only a small group (the inner cell mass) form the embryo proper. Here, the blastocyst is seen emerging from a hole in the zona pellucida (a protein "shell" around the oocyte). At this stage in nature, the blastocyst would be in the uterus & ready to begin implanting into the endometrium (the uterine lining). This image was produced in the course of In Vitro fertilisation research