The size of the fetus is about 5-6.3cm and weigh 14g.
Weeks 12-18 are a major, critical period in your baby’s brain development. Avoid any alcohol, tobacco or drugs because these could have long-term effects on your baby. This is also when your baby’s pituitary gland starts working and making its own hormones. Your baby’s placenta is now doing all the important work – filtering oxygen and nutrients to assist your baby’s growth. This week, your baby can suck its thumb. Its eyelids will fully cover the eyes, so they are well protected. Your baby’s intestines are starting to contract and relax, practicing for healthy digestion when they are born.