Embryo implantation in humans. After fertilization the human embryo begins a 4 day long journey down the fallopian tube and into the uterus. When the embryo reaches the blastocyst stage it develops two distinct populations of cells. The outer cell mass,called the trophectoderm, and the inner cell mass.
Cat eye glasses. Named after their resemblance to the shape of a cat's eye, cat eye glasses are probably the most popular style of vintage eyeglasses. Though cat eye glasses were around since the 1950's, they reached their peak popularity when Audrey Hepburn wore a pair in the 1961 film Breakfast at Tiffany's.
Cat-Eye Frames. Cat-eye glasses are designed to make a statement. They are retro. They are cool. They evoke confidence and let the world know that you want your glasses to be seen. Your cat-eye glasses tell others that you think about style in everything you do-including your eyeglass frames. Zenni Optical now offers a wide selection of cat-eye frames for the woman who is looking to stand out. If you seek to make a style statement and want something that is just a little different than the usual frames you see everyday, consider a pair of unique cat-eye frames or retro eyeglasses from Zenni Optical.