Fetal Development in the First Trimester

The first trimester is a period of rapid growth and development. From fertilisation through the first 13 weeks, your baby's major organs and body systems begin to form. 

Weeks 1–4
After fertilisation, the developing embryo travels to the uterus and implants in the uterine lining. The placenta also begins to develop and will provide oxygen and nutrients to your baby throughout pregnancy. 

Weeks 5–8
This is a time of rapid development. The brain and spinal cord begin to form, the heart starts developing, and the arms, legs, eyes, ears and facial features begin to take shape. 

Weeks 9–12
Your baby's development continues quickly. The limbs become more defined, eyelids form, the kidneys begin producing urine, and the fingers and fingernails develop. By the end of week 12, the baby is recognisably developing into a small human form. 

Looking After Yourself
The first trimester is an important time to prioritise your health. Attend your prenatal appointments, take recommended supplements such as folic acid, eat a balanced diet, stay hydrated and avoid alcohol and smoking.

If your pregnancy is uncomplicated, gentle physical activity may be continued according to your healthcare provider's advice.

Most importantly, remember that every pregnancy develops at its own pace. Your healthcare provider will monitor your pregnancy and recommend scans or tests when appropriate.

This article is for general information and does not replace individual medical advice.

*Medical checkups and screenings are important during this period to monitor the health of both the mother and the developing fetus ❤️❤️