The embryos were then transferred to recipient women. They had pregnancies when the recipient's cycle was from 4 days in front of to 3 days behind the donor's uterus at ovulation. This suggests a window of implantation of up to 7 days. Navot et al, in 1991 reported on donor embryo transfers done with 2-3 day old embryos on recipient cycle days 15-20 (artificial cycles controlled with meds). Pregnancies resulted from transfers on all days. This suggests a window of at least 6 days.
Polymers. The word polymer literally means many parts.. A polymeric solid material may be considered to be one that contains many chemically bonded parts or units which themselves are bonded together to form a solid.Two industrially important polymeric materials are plastics and elastomers.he word polymer literally means many parts.. A polymeric solid material may be considered to be one that contains many chemically bonded parts or units which themselves are bonded together to form a solid.
A polymer is a molecule with a lot of neat properties. They often make stretchy materials because the molecules themselves act like stretchy little springs that wind together. You can make a cool polymer slime from simple household materials.Try it! Materials: White glue, such as Elmerâs glue or woodworking glue. Liquid Laundry Starch, such as Sta-Flo brand (laundry aisle of fewer and fewer grocery stores Click here for store locator Click here to purchase online) .olored Slime: Color your slime with water based colored markers and knead the color throughout them. Polymers are very important molecules and are all around us, even inside us! The basic polymer molecule is a large molecule with repeating chains of chemical units.