Fetal development: The 3rd trimester – Mayo Clinic

Fetal development: The 3rd trimester

Fetal development continues during the third shipshape. Your baby will open his or her eyes, addition more weight unit, and prepare for pitch .By Mayo Clinic Staff
The end of your pregnancy is near ! By now, you ‘re tidal bore to meet your baby face to confront. Your uterus, however, is still a busy locate. here ‘s a weekly calendar of events for fetal development during the third clean-cut. Keep in beware that measurements are approximate.

Week 28: Baby’s eyes partially open

twenty-eight weeks into your pregnancy, or 26 weeks after conception, your baby ‘s eyelids can partially open and eyelashes have formed. The central anxious system can direct rhythmical breathe movements and control condition body temperature .
By now your baby might be closely 10 inches ( 250 millimeters ) long from crown to rump and weigh closely 2 1/4 pounds ( 1,000 grams ) .

Week 29: Baby kicks and stretches

Fetal development 27 weeks after conception

Fetus 27 weeks after conception

Fetal development 27 weeks after conception

By the end of the 29th workweek of pregnancy — 27 weeks after invention — your baby can kick and stretch .
twenty-nine weeks into your pregnancy, or 27 weeks after concept, your baby can kick, extend and make grasping movements .

Week 30: Baby’s hair grows

thirty weeks into your pregnancy, or 28 weeks after conception, your baby ‘s eyes can open wide. Your baby might have a adept promontory of hair by this week. loss blood cells are forming in your baby ‘s cram kernel .
By now your baby might be more than 10 1/2 inches ( 270 millimeters ) long from crown to rump and weigh about 3 pounds ( 1,300 grams ) .

Week 31: Baby’s rapid weight gain begins

thirty-one weeks into your pregnancy, or 29 weeks after creation, your pamper has finished most of his or her major development. now it ‘s clock time to gain weight — quickly .

Week 32: Baby practices breathing

thirty-two weeks into your pregnancy, or 30 weeks after creation, your child ‘s toenails are visible .
The layer of soft, downy hair that has covered your pamper ‘s clamber for the past few months ( lanugo ) starts to fall off this week .
By now your baby might be 11 inches ( 280 millimeters ) long from crown to rump and weigh 3 3/4 pounds ( 1,700 grams ) .

Week 33: Baby detects light

Fetal development 31 weeks after conception

Fetus 31 weeks after conception

Fetal development 31 weeks after conception

By the end of the 33rd week of pregnancy — 31 weeks after concept — your baby ‘s eyes can detect luminosity .
thirty-three weeks into your pregnancy, or 31 weeks after conception, your child ‘s pupils can change size in response to a stimulation caused by fall. His or her bones are hardening. however, the skull remains soft and compromising .

Week 34: Baby’s fingernails grow

thirty-four weeks into your pregnancy, or 32 weeks after invention, your pamper ‘s fingernails have reached his or her fingertips .
By now your pamper might be about 12 inches ( 300 millimeters ) long from crown to rump and weigh more than 4 1/2 pounds ( 2,100 grams ) .

Week 35: Baby’s skin is smooth

thirty-five weeks into your pregnancy, or 33 weeks after concept, your baby ‘s skin is becoming fluent. His or her limbs have a chubby appearance.

Week 36: Baby takes up most of the amniotic sac

thirty-six weeks into your pregnancy, or 34 weeks after conception, the crowd conditions inside your uterus might make it harder for your child to give you a punch. however, you ‘ll credibly still feel lots of stretches, rolls and wiggles .

Week 37: Baby might turn head down

thirty-seven weeks into your pregnancy, or 35 weeks after concept, your child has a firm clasp .
To prepare for give birth, your pamper ‘s pass might start descending into your pelvis. If your pamper is n’t head down, your health care provider will talk to you about ways to deal with this exit .

Week 38: Baby’s toenails grow

thirty-eight weeks into your pregnancy, or 36 weeks after creation, the circumference of your baby ‘s principal and abdomen are about the like .
Your baby ‘s toenails have reached the tips of his or her toes. Your baby has largely shed all of his or her lanugo .
By nowadays your baby might weigh about 6 1/2 pounds ( 2,900 grams ) .

Week 39: Baby’s chest is prominent

thirty-nine weeks into your pregnancy, or 37 weeks after concept, your child ‘s thorax is becoming more outstanding. For boys, the testes continue to descend into the scrotum. Fat is being added all over your baby ‘s body to keep him or her warmly after birth .

Week 40: Your due date arrives

Fetal development 38 weeks after conception

Fetus 38 weeks after conception

Fetal development 38 weeks after conception

By the end of the fortieth week of pregnancy — 38 weeks after conception — your baby is considered full terminus .
Forty weeks into your pregnancy, or 38 weeks after invention, your baby might have a crown-to-rump length of around 14 inches ( 360 millimeters ) and weigh 7 1/2 pounds ( 3,400 grams ). Remember, however, that healthy babies come in different sizes .
Do n’t be alarmed if your due go steady comes and goes with no signs of labor starting. Your due date is merely a account estimate of when your pregnancy will be 40 weeks. It does not estimate when your baby will arrive. It ‘s normal to give birth before or after your due date .

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  1. Pregnancy: Stages of pregnancy. Office on Women’s Health. https://www.womenshealth.gov/pregnancy/youre-pregnant-now-what/stages-pregnancy. Accessed Feb. 25, 2020.
  2. Frequently asked questions: Pregnancy FAQ 156: Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Patients/FAQs/Prenatal-Development-How-Your-Baby-Grows-During-Pregnancy. Accessed Feb. 25, 2020.
  3. American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth: Month to Month. 6th ed. American College of Obstetricians and Gynecologists; 2015.
  4. Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020.

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