During the fifth week of fetal development, a baby begins to develop its heart, muscles, bones, spinal cord and brain, according to WebMD. During this time, the umbilical cord connects to the baby to supply blood, oxygen... More » Health Women's Health Pregnancy

During the sixth week of pregnancy, changes to the body are noticeable to the mother. Clothing becomes tighter, and morning sickness has begun. The mother has probably gained a few pounds already, depending on whether sh... More » Health Women's Health Pregnancy

To calculate the date of conception, a woman with regular menstrual periods counts 11 to 21 days from the first day of her last cycle, according to the American Pregnancy Association. Since most women do not know the exa... More » Health Women's Health Pregnancy
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The body parts are grouped into several systems, including the nervous system of the brain, spinal cord and nerves that control the body, its muscles and glands; and the skeletal system of the bones and joints that suppo... More » Science Human Anatomy

On average, a pregnant woman will begin to feel the baby kicking at approximately 25 weeks into the pregnancy, according to WebMD. A slight fluttering feeling may be felt as early as 13 weeks. More » Health Women's Health Pregnancy

A woman who is experiencing her second or third pregnancy can feel the baby move at 13 weeks, according to WebMD. Women pregnant for the first time do not generally feel the baby's movements until at least 16 weeks. It i... More » Health Women's Health Pregnancy

A woman with an average 28 day menstrual cycle is most likely to get pregnant between days 12 and 15 of her menstrual cycle according to WebMD. The exact number of days that ovulation occurs after a woman's period ends v... More » Health Women's Health Pregnancy