-
Week 1- first trimester
You are not actually pregnant yet but your body is getting ready for it. Your uterus is thickening -
Week 3- first trimester
This is officially the start of the pregnancy, when the sperm and egg officially merge into one single cell. The zygote travels through the fallopian tube to get to the uterus as the cells continue to divide. -
Week 4- first trimester
The embryo attaches to the wall of the uterus. Cells begin dividing to create the baby's organs. The amniotic sac is forming. -
Week 5- first trimester
Buds on either side of the baby are growing into arms and legs. It looks like a tiny collections of tubes. The tubes are forming the brain and spinal cord and heart -
Week 6- first trimester
Although you can't hear it the baby's heart starts to beat. Human features are starting to appear including the two eyes and lids. The lungs and digestive system are starting to branch out -
Week 8- first trimester
Pregnancy symptoms really start to kick in. The baby has changed from an embryo to a fetus. You can start to make out the eyes, nose, ears, and upper lip. -
Week 10- first trimester
The tail is gone as the legs have finally grown in. The webbing between the fingers and toes are also gone. The connections in the brain are forming -
Week 11- first trimester
Even though you probably can't feel it, the baby has become active. The baby is growing fingernails and irises. -
Week 12- first trimester
By the end of this week the risk of miscarriage has significantly dropped. You've started putting on weight. The baby looks like a fully formed person. Fingers and toes are complete with nails and the kidneys are preparing to produce urine. -
Week 13- first trimester
The baby's head makes up 1/3 of its body. Placenta is helping the baby grow by providing nutrients and disposing of waste. -
Week 14- second trimester
The body is covered in lanugo. It is developing fingerprints -
Week 15- second trimester
The baby's skin is so thin you can see right through it. You can see blood vessels forming. The doctor is able to test for down syndrome and other chromosome problems. The baby's muscles are getting stronger. -
week 17- second trimester
The baby's lungs are breathing in amniotic fluid. Blood is pumping in the circulatory system and the kidneys are producing urine. The mother's breasts are growing bigger as they create milk to prepare to feed the baby. -
Week 18- second trimester
The baby measures 5 1/2 inches long. You can start to feel movement now. The ears have developed enough to hear. -
Week 20- second trimester
The baby can hear and may start reacting to sound. The baby measures 6.5 inches and weighs about 11 ounces. From here through the rest of your pregnancy it's likely you'll gain half a pund each week -
Week 21- second trimester
Tooth buds are forming in the baby's gums. Eye movement occurs and bone marrow is quickly producing red blood cells. -
Week 22- second trimester
Hormones and nerves are forming. Sex organs are beginning to develop -
Week 24- second trimester
The baby has reached viability. The wrinkles on the baby's skin are filling in and smoothing out as fat builds up underneath. -
Week 25- second trimester
The baby's heartbeat becomes clearer. The skin goes from see through to cloudy. -
Week 26- second trimester
The baby's eyes open. The baby may react to light now -
Week 28- third trimester
The baby can blink, cough, hiccup, and maybe even dream. The baby is moving into position for childbirth -
Week 29- third trimester
You should be able to feel practically all of the baby's movement. The brain is developing more wrinkles. The baby's senses are becoming more aware -
Week 30- third trimester
Your center of balance shifts and it becomes more uncomfortable and your joints loosen to prepare for labor. Your feet may grow because of this. -
Week 32- third trimester
The lanugo is falling off and the only hairs that will remain are the eyelashes, eyebrows, and on the head. -
Week 33- third trimester
The bones harden to support the baby as it gains weight. The only bones that stay soft are in the skull -
Week 35- third trimester
The baby begins to put on about .5 pounds per week and the baby's position moves lower to your pelvis, making it easier for you to breath because it's releasing the pressure on your lungs but applying pressure to your bladder making you have to use the restroom more frequently. -
Week 36- third trimester
The vernix caseosa has dissolved -
Week 37- third trimester
The pregnancy is now full term. The baby s engaging, or moving its head towards your pelvis to prepare for delivery. The immune system is arming up -
Week 38- third trimester
All of the baby's organs should be working now. The brain has started controlling all of the body's functions and the reflexes are active -
Week 40- third trimester
the baby should be ready for delivery this week. If not you may consider talking to your doctor about being induced.