Stages of Pregnancy By ShelbyGegg Oct 7, 2015 Week 1 Fertilization takes place, This is the time when the baby is concieved. Period: Oct 7, 2015 to Dec 30, 2015 First Trimester Oct 14, 2015 Week 2 The egg is now in the nutrient rich lining of the uterus and the cells are rapidly multiplying. Period: Oct 14, 2015 to Jul 24, 2016 Pregnancy Time Span Oct 28, 2015 Week 4 Right now the baby is the size of a poppy seed. The two layers in the picture will form the baby's organs and body parts. The bubble is the developing yoke sak. Nov 4, 2015 Week 5 The circulatory system will start to develop and the baby's heart will start to beat. Nov 11, 2015 Week 6 You can tell where the baby's nose, mouth and ears will take shape and the intestines and lungs are beginning to develop. Nov 18, 2015 Week 7 The baby has doubled the size it was in week 6 and the hands and feet are starting to develop. Nov 25, 2015 Week 8 The baby has now begun moving but the mother will not feel it until much later. Nerve cells are branching out throughout the body. Dec 2, 2015 Week 9 The baby's physiology is in place but even though the baby weighs a fraction of an ounce, he/she is about to start gaining a lot of weight. Dec 9, 2015 Week 10 The skin is still translucent but the nails on the baby's fingers are starting to develop. Dec 16, 2015 Week 11 The baby is almost fully formed. She/he is able to move and stretch and even hiccup as the baby's diaphram develops. Dec 23, 2015 Week 12 This week the baby's reflexes kick in. Their fingers will soon open and close, toes will curl, and the baby's mouth will make sucking movements. Dec 30, 2015 Week 13 The baby now has their very own fingerprints. The veins and organs are clearly visible through the skin. If it's a girl, she now has 2 million eggs in her ovaries. Period: Dec 31, 2015 to Apr 6, 2016 Second Trimester Jan 7, 2016 Week 14 The baby's brain impulses have begun to fire, and the baby is now using their facial muscles. The kidneys are up and running, and if you get an ultrasound, you may see them sucking their thumb. Jan 14, 2016 Week 15 The baby's eyelids are still fused shut, but the baby can sense light. The baby is the size of an apple. Jan 21, 2016 Week 16 Legs are becoming more developed and the pattern on the baby's scalp has begun. The baby's head is much more upright. Jan 28, 2016 Week 17 The baby can now move their joints and the skeleton is hardening to bone. Feb 4, 2016 Week 18 The baby can now flex their arms and legs, and it can be felt by the mother. Feb 11, 2016 Week 19 The baby's senses are developing and the baby can now hear you talk. Feb 18, 2016 Week 20 The baby can swollow now and their digestive system is producing what will be the baby's first poop. Feb 25, 2016 Week 21 The baby will now start to kick at the amniotic sac walls. Mar 2, 2016 Week 22 Features such as lips and eyebrows are more distinct. The baby's eyes will soon open. Mar 9, 2016 Week 23 The baby is great at hearing and the baby recongnizes certain voices. Mar 16, 2016 Week 24 The baby has a long and lean figure but that will change in the upcomming weeks. Mar 23, 2016 Week 25 The baby's wrinkled skin is starting to fill out with baby fat and the hair is comming in nicely. Mar 30, 2016 Week 26 The baby is now inhaling and exhaling amniotic fluid to prepare the lungs for breathing air at birth. Apr 6, 2016 Week 27 The baby now sleeps and wakes on a regular schedual and the lungs are fully formed. Period: Apr 7, 2016 to Jul 13, 2016 Third Trimester Apr 13, 2016 Week 28 The baby's eyelashes have grown and the baby's eyes are developing and can sense light from outside the mothers tummy. Apr 20, 2016 Week 29 The head is growing to make room for the developing brain and the muscles and lungs are preparing for birth. Apr 27, 2016 Week 30 The amount of amniotic fluid is now a pint and a half, although there will be less when the baby continues to grow. May 4, 2016 Week 31 The baby can now turn his/her head and a layer of fat is accumulating under the skin. May 11, 2016 Week 32 Both the mother and baby are gaining weight quickly. May 18, 2016 Week 33 The bones in the baby's skull are not fused yet because of how the baby will have to leave the womb. They will not be fused until adulthood. May 25, 2016 Week 34 The baby's centeral nervous system is maturing as are the lungs. Jun 1, 2016 Week 35 The baby's kidneys are fully developed and the liver can process some waste products. Jun 8, 2016 Week 36 The waxy substance that protects the baby's skin throughout pregnancy is fading away as the baby prepares for birth. Jun 15, 2016 Week 37 The lungs and brain are fully maturing as the baby looks more and more like a newborn. Jun 22, 2016 Week 38 The baby's eye color is developing. Jun 29, 2016 Week 39 The baby is regulating their body teperature for the outside world. Jul 6, 2016 Week 40 Preparing for birth. Jul 13, 2016 Week 41 The baby has now passed the due date which means more than likely the mother will have to be induced.