Note for use of this pregnancy calendar: A pregnancy usually lasts 38 weeks from conception, or 40 weeks from the start of your last menstrual period (LMP). If you are counting from the date of conception, just add two weeks to use this calendar. For example, if you conceived two weeks ago, you are in week 4 by the usual method.
The length of the developing baby is measured from the crown of the head to the bottom of the baby's rump, this is referred to as the CRL measurement
your baby will be 50mm or two inches long by the end of the 9th week
eyelids are formed and will close over eyes until around the 24th week
baby's head is becoming more rounded and makes up half the length of your baby
this is the beginning of the fetal period, meaning that the embryo has developed into a recognizable human being and all major systems have been formed
fingernails and toenails start to grow
Week 12
the ears are fully formed but are still lower than normal
baby will be 61mm or just about 2½ inches long at the end of this week
sex organs are noticeably male or female, but aren't fully formed yet, gender might be hard to distinguish by ultrasound at this point
bones really start to develop around this time
If you have a prenatal check up this week, you may be able to hear your baby's heart beat with a device called a doppler, but probably not with a regular stethoscope
you may notice your clothes getting a little snug around the waist as the uterus rises above the pelvis
Week 13
baby opens his mouth for the first time and may suck on a finger that gets too close
little eyes move closer together and ears move higher up on the head, making your baby look more like he or she will at birth
the neck continues to become more defined and straight
your little one is growing and growing, this week it is 2.6 to 3.1 inches long and weighs around half an ounce
you may be able to feel your uterus just above your pelvic bone as it expands to accomodate your baby, placenta, and amniotic fluid
end of the first trimester!!
Week 14
your baby is around 3 to 4 inches long this week and weighs around 1 to 1 and a half ounces
little feet are half an inch long, with tiny toes that are becoming more separate as the webbing between them shrinks
Boy or Girl? After the 12th (14th) week it is possible to determine your baby's sex via ultrasound, although it is not always foolproof, so you might want to wait on the pink paint:)
Are you showing yet? Everyone is different, and you may show earlier if this is not your first pregnancy.
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Sources for fetal development information include: The Developing Human by Moore and Persaud, how life begins by Christopher Vaughan, and Your Pregnancy Week-by-Week by Glade B. Curtis
This internet site provides information of a general nature and is designed for educational purposes only. If you have any concerns about your health or that of your child, you should always consult with a physician or other healthcare professional.