Stages of Pregnancy 

Week 1 to Week 12

Signs and symptoms ;

1. During the first few weeks of the pregnancy, the period becomes very weak losing little blood. 
2. Vomiting and morning sickness day and night around week 4 and week 6.
3. Feeling tired and lazy during the 12 weeks of pregnancy period.
4.  Increase urination and increase pee time per day.
5. Enlargement and development of beasts due to increased number of fat cells.
6. Strange emotions ,smells lead to vomiting and eating less. 

Placental changes

1. During a few weeks of pregnancy, the embryo attaches to the yolk sac providing nourishment.
2. Placental formation: Embryo is surrounded by fluid inside the amniotic sac and the outer layer of this sac develops into placenta.
3. Nervous system development: Neural tube form(brain and spinal cord), At this stage, the embryo is around 2mm long.
4. Heart formation: The Fetus has some development of heart tube. 
5. Folic acid prevents spina bifida. You should starts taking it as soon as you find out you’re pregnant.

Week 13 to 28 

Signs and symptoms ;

1. There is a disappearance of symptoms like nausea and fatigue.
2.  Your abdomen will expand as baby continues to grow.
3. You will feel your baby beginning to move!
4. Aching Body mainly at the back, abdomen, groin, or thigh pain
5. Darker skin near the nipple area.
6. Numb or tingling hands, called as carpal tunnel syndrome
7. Swelling of the ankles, fingers, and face. ( If it occurs suddenly then consult a doctor ) .

Week  29 to 40 

Signs and symptoms ;

1. Women with breathing difficulty.
2. Heartburn
3. Hemorrhoids
4. Trouble sleeping
5. Baby “dropping”, or moving lower in your abdomen
6. Swelling of the ankles, fingers, and face.
7. The baby is getting bigger and it is putting more pressure on organs of mother.