Week by Week

What pregnant women need to know in week 31 of pregnancy?

By Medically reviewed by Dr. Duyen Le.

msBahasa Malaysia

Baby Development

How is my baby growing?

Your baby is about the size of a coconut, weighs about 1,5kg and measures about 40cm from head to heel.

By now your baby urinates approximately about 250ml of urine a day into the amniotic fluid. He or she is also swallowing amniotic fluid, which is completely replaced several times a day. Excess fluid in the amniotic sac may mean that your baby isn’t swallowing normally or that there is a gastrointestinal obstruction. Inadequate fluid in the amniotic sac may mean that the baby isn’t urinating properly and could indicate a problem with the kidneys or urinary tract. Your doctor will measure your levels of amniotic fluid as part of your routine ultrasound.

Body & Life Changes

How is my body changing?

You may feel the uterus tightening which called Braxton Hicks contractions in the second half of pregnancy. They’re irregular and often lasting about 30 seconds. At this point, they should be infrequent and painless. Frequent contractions, on the other hand, even those that don’t hurt may be a sign of preterm labor. Call your doctor immediately if you have more than four contractions in an hour or any other signs of preterm labor. They may include an increase in vaginal discharge or a change in the type of discharge (if it becomes watery, mucus-like, or bloody, even if it’s pink or just tinged with blood); abdominal pain or menstrual-like cramping; an increase in pressure in the pelvic area; or lower back pain, especially if you didn’t have it before.

The milk glands in your breasts may have started to make colostrum by now. Colostrum is the pre-milk that provides your baby with calories and nutrients for the first few days before your milk comes in to breastfeed. For some women, it is thin and watery. For others, it is thick and yellowish. If you notice your breasts leaking colostrum, you can buy disposable or washable breast pads to protect your clothing.

What should I be concerned about?

To meet the demand of pregnancy, your body will have more blood than normal so your heart will pump blood faster. Unfortunately, changes in your circulatory system to support your baby’s development may cause some side-effect and discomfort. When your veins get bigger to contain the increased amount of blood, they will stand out and you can see green or red blood vessels under the skin, especially on your feet and ankles.

Doctor Visits

What should I tell my doctor?

In the third trimester, you have one more bladder problem: urine leakage as the pressure is on the belly. This makes your bladder difficult to control and you will lose some urine when you cough, laugh, sneeze, lift heavy objects, or even laughing.  To be sure that is urine or amniotic fluid, you should smell it. Tell your health care provider immediately if your fluid does not smell like ammoniac of urine but the sweetness of amniotic fluid.

What tests should I know about?

You might have to meet your doctor regularly next month, every 2 weeks at first and then every week until the delivery. In the test of this month, your blood pressure and weight will be tested; you may be asked about any signs and symptoms you might have. Your doctor also asks you to describe the movements and schedule of activities of your baby: when your baby moves and when he or she does not. The size of your uterus will be checked as usual.

Health & Safety

What should I know about staying healthy and safe during pregnancy?

It’s generally safe to walk pretty much throughout your pregnancy. It gets harder as you get further along and are carrying more weight, but there’s no danger to your baby. As pregnancy progresses, even the expert runner generally needs to modify her routine.

However, it’s not good to jog if you have placenta previa, in which the placenta covers the cervix, because too much jolting can make you bleed. It’s also unsafe if you have pregnancy-induced hypertension or are at high risk for a preterm delivery.

How will your baby’s growing in next week?

Hello Health Group does not provide medical advice, diagnosis or treatment.

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