Your Pregnancy At Week 1
Sensitive to light
The sucking reflex
Strong heart
Continued breast growth
Bleeding gums
Your Body at Week 1
For now, it will seem like nothing is happening on the outside — but only for the next couple of weeks. If your timing is right and you've had sex during ovulation, your egg has been fertilized by one lucky sperm and your body is gearing up to host the blastocyst (which will soon become your baby!) that's heading for the uterus, its home for the next nine months.
So what's happening inside this week? Just after the egg is released, the follicle it came from gets a new tenant called the corpus luteum, a yellowish body of cells that occupies the space left by the egg. The corpus luteum starts to produce progesterone and some estrogen, enough of both pregnancy hormones to nourish and support the future baby until the placenta takes over in about 10 weeks

Rapid growth
At 16 weeks pregnant, your uterus is growing at about the same pace as your baby's — aka pretty darn fast! — and it's getting to the point where you may not be able to hide your pregnancy anymore, even if you wanted to.
You're still also likely enjoying the relative bliss of trimester two, especially compared with trimester one, and will soon be able to see more of your baby at your ultrasound in a few weeks.
Week 1 FAQ's
Product of the Week
BABYGO Birthing Ball
We are committed to helping more pregnant ladies to be healthier. Get the extra comfort, support and help you need, during pregnancy, labour and postnatal.
Learn MoreBoy & Girl Name of the Week
Recipe of the Week
Teriyaki beef skewers with snow pea salad
BABYGO Recipe of the WeekIngredients
- 650g rump beef steak, thinly sliced
- 1/3 cup (80ml) teriyaki sauce
- 250g snow peas, halved lengthways
- 1 Lebanese cucumber, thinly sliced
- 50g mixed baby salad leaves (mesclun)
- 2 cups (400g) jasmine rice, cooked to packet instructions
- DRESSING
- 1 teaspoon sesame oil
- 1 tablespoon rice vinegar
- 1 tablespoon mirin (sweet Japanese rice wine)
- 1 tablespoon light soy sauce
- 1-2 teaspoons wasabi paste, to taste
- 1 teaspoon caster sugar
Cooking Instructions
- Thread beef on 8 metal or soaked bamboo skewers, folding each slice in half as you go. Place in a shallow dish and pour over teriyaki sauce. Marinate for 5 minutes.
- Meanwhile, cook peas in lightly salted boiling water for 1 minute until just tender. Drain and refresh in cold water. Place in a bowl with cucumber and leaves. Whisk dressing ingredients together, then toss with salad.
- Heat a chargrill pan on medium-high. Remove skewers from marinade and cook for 2 minutes each side until charred and cooked through. Serve with salad and rice.
Week 1 TODO's
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Start your birth plan Print a birth plan template
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Write to your employer 15 weeks before you plan to stop work Maternity leave and how to give notice to your employer
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Start your birth plan Print a birth plan template
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Write to your employer 15 weeks before you plan to stop work Maternity leave and how to give notice to your employer
-
Start your birth plan Print a birth plan template
See what else you can expect in the pregnancy calendar
Last Reviewed
From the What to Expect editorial team and Heidi Murkoff, author of What to Expect When You’re Expecting. Health information on this site is based on peer-reviewed medical journals and highly respected health organizations and institutions including ACOG (American College of Obstetricians and Gynecologists), CDC (Centers for Disease Control and Prevention) and AAP (American Academy of Pediatrics), as well as the What to Expect books by Heidi Murkoff.