Pregnancy Calendar
The Second Trimester
This is what is going on in your body throughout the second trimester on your pregnancy calendar:
Pregnancy Calendar: Weeks 13-14
You can't feel the baby moving yet, but they get more active in the second trimester. Here is what's happening: - skull is becoming more solid - ribs are beginning to form but you can't see them yet - prostate gland or ovaries are starting to develop - roof of the baby's mouth is almost whole - the baby may start sucking their thumb
Pregnancy Calendar: Weeks 15-17
By the fifth month, your baby has grown to four or five inches long and weighs about 3 ounces. Here's what else is going on: - a layer of transparent skin can be seen covering the baby - bones and bone marrow are beginning to form - a layer of fat for energy, protection and warmth is coming together - eyebrows and head hair have begun to grow - the baby's eyes and ears are more visible now - the eyes are growing sensitive to light and the baby can squint - frowning and other facial expressions are noticeable - the baby is able to form a fist - the baby can also swallow - ears are in their final position and there are nerves connecting them to the brain At this point, your baby can hear things like the beat of your heart and the rumble of hunger pains when you haven't eaten. The baby may even react to loud noises by jumping or moving.
Pregnancy Calendar: Week 18
Many moms-to-be can feel the baby moving around by week 18, and if you haven't yet you soon will. Your baby hears better now, and can faintly make out your voice and other sounds around you. The baby's reflexes are developing and their kidneys are now functioning. When your baby excretes urine, it is stored in your amniotic sac. The baby has also grown a protective coating called vemix and a fine layer of hair called lanugo for protection of their thin skin.
Pregnancy Calendar: Weeks 19-20
By now your baby is around 6 inches long, weighs approximately 9 ounces, and you can probably feel them moving around. The baby's skin is losing its transparency and their eyebrows and head hair have become more visible. At this point, the baby's bone marrow starts to produce blood cells, and your baby can ingest sugars from within your amniotic fluid.
Pregnancy Calendar: Week 21
At 21 weeks, the baby weighs approximately one pound. Here's how the rest of the progress looks: - the baby now has the sense of touch - taste buds are fully developed - genitals are completely formed - breathing practice begins with the movement of amniotic fluid in and out of their lungs - skin is becoming more opaque and fat is increasing - fingerprints are intact - the inner ear is developed so that the baby knows if they are upside down - a sleeping and waking schedule becomes apparent - fingers and hands are completely formed, but they still don't' have total control - the baby is much more active now
Pregnancy Calendar: Weeks 24
By the end of the second trimester, the baby is up to two pounds and is growing fast. Development is well on its way to completion, and your baby now has clearly visible eyes, eyebrows and eyelashes. The baby's organs are rapidly developing now, and their immune system is preparing for the time of delivery.
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