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last day of menstrual cycle
The baby is conceived. -
proliferative phase
it begins from day one and continues for 14 days for an average of 28 days. proliferative phase forms an environment that is safe for any incoming sperm. -
Fertilization
During this stage a male sperm and a female's egg unite to form a zygote. Then the cell travels through the fallopian tube, where it becomes a morula. Once it gets to the uterus the morula becomes a blastocyst. The blastocyst then burrows into the uterine lining in a process called implantation. -
1st month
Start of the first trimester. The baby develops black spots for eyes. The brain, spinal cord, heart, back bones, muscle, ribs, and lungs. The placenta begins to form. Its purpose is to provide the developing embryo with oxygen and nutrients, as well as to remove waste products.the baby is .1 inches and less than .1 ounces. -
2 weeks after
pregnancy test will be positive. -
Ovulation
part of the ovary called the ovarian follicle discharges an egg. The egg then travels down the fallopian tube, where it may encounter a sperm and become fertilized. -
2nd month
During the second month the baby continues to develop his internal organs and also develops ectoderm, mesoderm, and endoderm. Ectoderm develops into the nervous system and skin, mesoderm develops into the muscles and bones, and endoderm develops into the digestive and respiratory systems. Also external limbs such as amrs, legs, fingers etc. Begin to form. The baby is 1 inch and .03 ounces. -
3rd month
During the third month of pregnancy, the baby's organs continue to develop, and the baby can start to move its arms and legs. The baby's sex organs also begin to develop during this time. The sex is determined by an XX or XY chromosomes XX for female and XY for male. This also marks the end of the first trimester. The baby is 3 inches and .81 ounces. -
4th month
Beginning of the second trimester. During this month the baby begins to develop his special senses such as touch, taste, smell, sight, and hearing. During this stage the lanugo and vernix will also begin to develop. The baby is around 6 inches and around 4-5 ounces. -
5th month
During this month the baby is growing rapidly in size and weight. The baby's bones are becoming harder, and the skeleton is starting to form. The baby's muscles are also developing, and the baby is starting to move around more. the baby's hair is starts to grow. The baby continues to develop internal organs. Additionally, the baby's senses continue to develop, and the baby can now hear sounds from outside the womb. The baby is 10 inches and 10 ounces. -
6th month
This is the end of the second trimester. During this month the baby is rapidly developing his internal organs and extremities. His reflexes and senses are also developing very rapidly. The baby is 14 inches and 1 pound -
Born prematurely
During this stage the baby can survive outside the womb. If the baby is delivered before this time it is very likely that the baby will not survive. -
7th month
Beging of the third trimester and of fat accumulation. During this stage the baby develops his major reflexes and continue to develop until the end of the trimester. Also during this time many major organ are fully developed and can function on their own. The baby is 16 inches and 2.4 pounds. -
8th month
During the 8th month of pregnancy, the baby's major organs are fully developed, and the baby is now focused on gaining weight and growing larger in size. The baby's brain is continuing to develop, and the baby is now capable of learning and remembering. The baby's immune system is also developing. At this stage, the baby's bones are fully formed, but they are still soft and pliable to make it easier for the baby to pass through the birth canal. The baby is 18 inches and 4 pounds. -
9th month
This is the end of the third trimester. At this point the baby is fully developed and ready to exit the womb. The baby's organs are fully developed and ready to work once the baby is born. The baby is 20 inches and 8 pounds.