Baby will measure about 10 inches long and weigh about 3/4 of a pound by the end of this month.
The amniotic fluid increases a lot this month and your baby enjoys moving about freely inside the amniotic sac.
It's kidneys now make urine.
Hair begins to appear on it's head.
A fine downy hair(lanugo) Begins to appear over your baby's body.
It's eyebrows and eye lashes begin to grow.
It's skin begins to fill out with fat.
It starts a growth spurt in both length and weight.
Baby's heartbeat will now be heard by the end of this month by a special stethoscope called a fetoscope: this usually marks the midpoint in pregnancy.
Baby's movements may become strong enough for the mother to feel by the end of this month.
YOUR BODY
Your uterus grows to just below your navel by the end of this month.
Your weight gain starts to increase by about 3/4 to 1 pound a week now: you may gain 3-4 pounds this month.
The placenta secretes hormones into your body that helps to soften some of your joints and muscles to make labor and delivery easier.
Your appetite increases, so you may find yourself hungry more often.
Cravings may start for certain foods and may continue throughout pregnancy.
Your nipples and the area around them become much darker in color.
A line down the middle of your abdnomen may darken(linea nigra) or also called "The mask of pregnancy."
You may become more susceptible to urinary tract infections, so you need to drink at least 6-8 glasses of water daily.
Your pregnancy is now beginning to show.
You are less tired and fatigued now, and may find that you are beginning to enjoy pregnancy much more.
YOUR RESPONSIBILITIES
Get your prenatal check-up this month.
Exercise is still okay, so continue that.
Make sure that seat belts fit low over your hips.
Learn and practice Kegel and pelvic rock exercises everyday.
Lie down and get your feet up for at least 30 minutes a day.
Continue to take your prenatal vitamins and iron.
Pick out some comfortable clothes to wear as you increase in size.
If you are employed, find out about maternity leave.
Discuss with your partner(if hes in the picture) about what you both think the baby will be like: hair color, eyes, personality, and also what it will be like with the responsibility of a new baby.