When the mother's egg is initially fertilized by the father's sperm, it is referred to as a zygote. This single cell develops into a ball of cells called the blastocyst, and then an embryo over the following two weeks. During week eight, it...
The human fetus develops according to a set of precisely ordered and timed stages. The mother's egg is fertilized by the father's sperm and becomes a zygote---a single cell containing a new, complete set of DNA. This zygote rapidly divides and...
You're halfway there. Twenty weeks into pregnancy or 18 weeks after conception marks the midpoint of a normal full-term pregnancy and you may feel the baby's first movements, known as quickening, at this point, according to MayoClinic.com. Growth...
Thrombocytes are platelets. They have the important job of helping the blood clot to stop someone from bleeding. They circulate throughout the bloodstream, and when a blood vessel is damaged, within seconds they are at the damaged area. Platelets...
A baby's senses of touch, taste, smell, hearing and vision begin to develop well before birth. According to Dr. Stanley Graven, a University of South Florida professor specializing in neonatal brain development, all five senses develop at around...
