I,3,4,7 hope this will help
I wish I knew but I don’t know I am so sorry but I really want to Brimley list can I please get the brain leash
I think what they rely on is there experiment and how they do it
The fertilized egg begins a rapid descent to the uterus. The period of rest in the tube appears to be necessary for full development of the fertilized egg and for the uterus to prepare to receive theegg. ... At the end of this transition period, the embryo becomes a mass of very organized cells, called a blastocyst.
