The first trimester of your pregnancy can be a very exciting time. But there's lots to consider and plan for, and you’ll need to know some key things first.

A miscarriage is the loss of a baby, usually during the first three months or "first trimester" of pregnancy.

By week 12, your baby is the size of a plum but fully formed, with their organs, muscles, limbs and bones in place.

This video is about the physical and emotional changes you can expect in the first trimester of pregnancy. Mums and dads describe their experiences.

uterus; embryo; fetus; foetus; weeks; trimester; first; hormones; fathers; dads; pregnancy; early; changes; body; what; to; expect; south; australia; During the first 12 weeks or 3 months of your pregnancy, you will usually only put on about 1 or 2 kilos, or possibly less if you have morning sickness

Tips on quitting when your pregnant, from first trimester to post delivery.

You may wish to find out early in your pregnancy if your baby is at increased risk of a serious health condition by having a screening test in your first trimester (the first 3 months of pregnancy).

Not all pregnancies lead to acne but if you have hormonal acne, it is likely to flare during the first trimester (first three months) of your pregnancy. Find out what you need to know.

During your first trimester (the first 3 months of your pregnancy) you may be offered a range of tests to check if you have any infections or health conditions.

Your doctor can look at your foetuss features to determine how old they are find out how. You need to talk to your doctor if you experience very severe morning sickness as you may not be getting all the nutrients you and your baby need or early pregnancy spotting (spot bleeding) as you may be at risk of miscarriage.