Pregnancy Trimesters

From baby’s size and development to leading pregnancy symptoms of the first trimester, second trimester and third trimester, here is a peek into your pregnancy trimesters.

A full pregnancy term is about 40 weeks as baby’s due date is calculated from the first day of your last normal period. However, your unborn child only spends around 38 weeks in the womb. This period can be divided into three trimesters, lasting around 12 weeks each where expectant mothers can follow the development and changes expected to happen over this period through a pregnancy calendar. Here is a brief overview of what to expect.

First Trimester – Conception to 12 weeks

During the first trimester of pregnancy, a woman’s body undergoes many hormonal changes, which can trigger a series of symptoms. It is these symptoms that usually alert women to their pregnancy. The first and most obvious symptom is the cessation of their period. Women may also experience nausea (morning sickness), tender breasts, constipation, fatigue, headaches, weight gain or even weight loss. By the end of the third trimester the fetus has grown to 5.5cm/2.2in and weighs 14gr/0.4oz. It’s at this point that sickness and nausea may finally pass, allowing for a healthy appetite to return and help you gain the weight you need to carry the pregnancy.

Second trimester – 13 to 24 weeks

As sickness, discomfort and other pregnancy symptoms from the first trimester begin to pass, a new set of changes occurs to accommodate the growing baby inside. Your stomach will start to become noticeably bigger and by the end of this trimester you should be able to feel your baby move. Most women find this trimester of pregnancy the most enjoyable as early pregnancy symptoms have passed and baby has not become so big yet. Some typical changes in women’s bodies include swelling, body aches, changes in skin pigmentation and weight gain. By the end of the second trimester your baby has grown to 30cm/12in and weighs about 600gr/1lb. Now is a good time to start getting everything ready for the arrival of your baby.

Third trimester – 24 to 40 weeks

Most likely, the symptoms from the second trimester will continue. Women may find that they have breathing difficulty and are running to the toilet often. This is because the size of the baby and the pressure it puts on mom’s internal organs. Some additional symptoms include heartburn, haemorrhoids, protruding belly button and contractions. Your baby is now around 51cm/20in long and can weigh between 2.5kg/5lb to 4kg/8lb. As you get closer to you due date, your cervix starts effacing where it becomes thinner and softer. Your baby will drop and turn around as it prepares for birth. A vaginal exam with your doctor can ensure you are ready to give birth. Good luck!