First trimester: During the first trimester, the body undergoes many changes. Hormonal changes affect almost every organ system in the body. These changes may trigger symptoms even in the first weeks of the pregnancy.
Stopping period is a clear sign that you are pregnant. Other changes that may include:
- Tender & swollen of the breasts.
- Need to pass urine more often
- Distaste for certain foods.
- Upset stomach.
- Mood swings
- Weight gain or loss
As body changes, you might need to make changes daily routine, such as going to bed earlier, eating frequent & small meals.
Most of these discomforts will go away as pregnancy progresses.
Some women might not feel any discomfort at all.
First trimester (week 1-week 12): Developmental Sequence
At four weeks:
- Baby’s brain and the spinal cord have begun to form.
- The heart begins to form.
- Arms and the leg buds appear.
- Baby is now an embryo and your baby is around 6-7mm (1/4 inch) long.
At eight weeks:
- All major organs and external body structures have begun to form. Each ear begins as a little fold of skin at the side of the head.
- Baby’s heart beats with a regular rhythm.
- The arms and the legs grow longer, and the fingers and toes have begun to form.
- The sex organs begin to form.
- The spinal cord, brain and the central nervous system is well-formed.
- The eyes are moved forward on the face and eyelids have formed.
- The umbilical cord is clearly visible.
- At the end of eight weeks, Your baby is nearly 1 inch long and weighs less than one-eighth ounce. your baby is a fetus and looks more like a human.
- Digestive tract and the sensory organs commence developing. Bone commences replacing cartilage. The embryo commences moving, albeit the mother cannot yet feel it.
At twelve weeks:
- The nerves and muscles commence working together. Your baby can make a fist.
- The external sex organs show if the baby is a boy or girl. A woman who has an ultrasound in the second trimester or later might be able to ascertain the baby’s sex.
- Eyelids close to protect the developing ocular perceivers. They will not open again until the 28th week.
- Head magnification has slowed, and the baby is much longer. Now, at about 3 inches long, the baby weighs almost an ounce in 8 weeks.