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How your baby's growing
By the end of week four the round and pointy ends of your little pear-shaped baby will be slightly more exaggerated and its body will look more like that of a miniature manatee and rather alien-like. But despite your baby having no discernable eyes, ears or mouth, the earliest developments of what will become the larynx, internal ear, and eye lens are already forming. Likewise, tiny bumps are forming on your little embryo which will eventually be their little arms, elbows, fingers, legs, knees and toes.

What's more your little swimmer will have a teeny tiny tail by the end of this week which is in fact their developing spinal cord. A microscopic photo would reveal vertebrae filling out the spine and tail. Although they are not bones as yet, but rather, the “bone seeds” that will become your baby's tiny vertebrae, ribs and sternum.

How your life's changing
If your baby wasn't planned, this may be the first time you have an inkling that you're pregnant. You can see our symptoms of pregnancy to see if what you are feeling is common in pregnancy. If your pregnancy test was negative or inconclusive but your period still hasn't arrived, you can repeat it now. Need help with reading it? Find out what the faint line on your home pregnancy test may means you're pregnant. It may seem an odd time but in fact it's a great idea to start an exercise routine now. Exercise helps you develop good muscle tone, strength and endurance. It helps you manage the extra weight you'll put on (or prevent you putting to much more on if you're already overweight gets you fit for labour - and makes getting your figure back after birth easier too. Choose a safe, moderately vigorous activity you enjoy. Walking and swimming are fine when you're pregnant. You might also want to do some easy yoga stretches - there are special classes adapted for pregnancy. Make sure the exercise instructors who teach you are qualified to instruct pregnant women and, if it isn't a class specifically for pregnancy, let the instructor know that you are pregnant. Know your limits and make sure you don't overdo it if you are new to exercise.

Pregnancy tip
"To prevent stretch marks, I've been rubbing olive oil into my stomach since the day I learned I was pregnant. A friend told me stretch marks are hereditary, but I'm not taking any chances!" - Shimi. Share your tips below or you can discuss with others on maya voice.

Community
Just found out you're pregnant? Join Maya Community and hear from other parents expecting in the same month as you.

Things to consider
Make an appointment to see your doctor for your first antenatal check discuss you care in pregnancy. Go through decisions to be made to understand that there's a lot to think about when you're pregnant, and many choices to make along the way. Do you need to take antenatal supplements as part of a healthy diet for pregnancy? Find out on first antenatal check up. Feeling a bit light-headed? Find out what you can do about dizziness and fainting.