Am 4month pregnant but why when I go for checkup...

Weight gain in pregnancy:
Weight gain in pregnancy varies greatly. Most pregnant women gain between 10kg and 12.5kg, putting on most of the weight after week 20. Much of the extra weight is due to your baby growing, but your body will also be storing fat, ready to make breast milk after your baby is born. Putting on too much or too little weight can lead to health problems for you or your unborn baby.

Gaining too little weight:
Gaining too little weight can cause problems such as premature birth and a baby with a low birth weight.
It can also mean your body isn't storing enough fat.
Lack of weight gain can be related to your diet and weight before you become pregnant.
But some naturally slim women stay slim while they're pregnant and have healthy babies.
Staying active
Staying active is important while you're pregnant, as it'll prepare your body for labour and birth. Keep up your normal daily activity or exercise, unless you have been advised by your midwife or GP not to exercise.

Advice about your weight:
Your midwife or GP may have special advice for you if you have a body mass index (BMI) of over 30 or below 18.5 If you're concerned about your weight or any other aspect of your health while pregnant, ask your midwife or GP for advice.