Nicole's Pregnancy Calendar

覧 Development begins with a single-cell embryo at conception!!! (Age: 0 days) 覧 One cell becomes two. (30 to 36 hours) 覧 With 12 to 16 cells, the embryo is shaped like a tiny bunch of grapes. (3 days) 覧 The site of the future back and chest can be seen. (4 days) [ More Events ] | New Journal Entry 覧 The embryo begins to implant in the womb. (6 days) [ Less Events ] | New Journal Entry

覧 The hormone hCG triggers a positive pregnancy test. (8 days) 覧 Cells in the womb near the embryo are loaded with nutrients. 覧 The amniotic sac begins forming. (10 days) 覧 Implantation is complete and the placenta is starting to form. (12 days) [ More Events ] | New Journal Entry 覧 The embryo is now symmetrical about the midline. (13 days) [ Less Events ] | New Journal Entry

覧 The early heart can be seen. (18 days) 覧 The brain has three major divisions. (3 wks) 覧 Blood cells and blood vessels are forming. (3 wks) 覧 The heart is shaped like a tube. (3 wks) [ More Events ] | New Journal Entry 覧 A tiny trachea or windpipe is forming. (3 wks) [ Less Events ] | New Journal Entry

覧 The heart begins beating! (3 wks, 1 day) 覧 The amnion surrounds the embryo with a fluid-filled sac. (4 wks) 覧 The umbilical cord is in place. (4 wks) 覧 The heart beats more than 100 times per minute. (4 wks) [ More Events ] | New Journal Entry 覧 Limb buds (soon-to-be arms and legs) appear. (4 wks) 覧 Part of the brain that will control coordination is present. (4 wks) 覧 The skin is so thin, you can see through it! (4 wks) [ Less Events ] | New Journal Entry

覧 The brain's five main sections are visible. (4 wks, 4 days) 覧 Cerebral hemispheres appear and begin to grow rapidly. (4 wks, 4 days) 覧 The head makes up one third of the whole embryo! (5 wks) 覧 The permanent kidneys are in place. (5 wks) [ More Events ] | New Journal Entry 覧 Hand plates have arrived. (5 wks) 覧 Lung sections reflect the pattern of adult lungs. (5 wks) [ Less Events ] | New Journal Entry

覧 Joints of the wrists are forming. (5 wks, 1 day) 覧 Foot plates are present. (5 wks, 2 days) 覧 Subtle movement begins. (5 wks, 5 days) 覧 The heart's four chambers are easily seen. (5 wks, 6 days) [ More Events ] | New Journal Entry 覧 The face withdraws if lightly touched around the mouth. (6 wks) 覧 The diaghragm is largely formed. (6 wks) 覧 Electrical connections are forming in the spine. (6 wks) 覧 The external ear is taking shape. (6 wks) 覧 The appendix can be seen. (6 wks) [ Less Events ] | New Journal Entry

覧 Brainwave activity is reported. (6 wks, 2 days) 覧 Bones first form in the collar bones and jaw. (6 wks, 4 days) 覧 The hands begin to move. (6 wks, 4 days) 覧 The heart is nearly complete. (7 wks) [ More Events ] | New Journal Entry 覧 Testes are present. (7 wks) 覧 Ovaries can be identified. (7 wks) 覧 The head sometimes turns. (7 wks) 覧 Fingers and toes emerge. (7 wks) 覧 Hiccups may occur from now on. (7 wks) [ Less Events ] | New Journal Entry

覧 The hands touch each other, as do the feet! (7 wks, 4 days) 覧 Knee joints have arrived. (7 wks, 4 days) 覧 The fingers are free. (7 wks, 4 days) 覧 The toes are free. (7 wks, 6 days) [ More Events ] | New Journal Entry 覧 Occasional breathing motions begin. (8 wks) 覧 The skin thickens, losing transparency. (8 wks) 覧 Some embryos are right-handed, some are left-handed. (8 wks) 覧 Male embryos are already making testosterone! (8 wks) 覧 The embryo floats and rolls over in the womb. (8 wks) 覧 The embryo's joints are similar to adult joints. (8 wks) 覧 The embryo has more than 4,000 parts (adults have about 4,500). (8 wks) 覧 The embryonic period ends at 8 weeks, then the fetal period begins. (8 wks) 覧 Hair grows on the brow and around the mouth. (8 wks) [ Less Events ] | New Journal Entry

覧 The mouth opens and closes, and the tongue moves. (9 wks) 覧 The eyelids are now fused. (9 wks) 覧 Swallowing amniotic fluid is beginning. (9 wks) 覧 The fetus sighs, stretches, and moves the head. (9 wks) [ More Events ] | New Journal Entry 覧 Female fetuses have early reproductive cells in their ovaries. (9 wks) 覧 Thumb sucking begins. (9 wks) 覧 Grasping objects begins. (9 wks) [ Less Events ] | New Journal Entry

覧 Yawning begins. (9 wks, 4 days) 覧 Vocal cords are developing. (9 wks, 4 days) 覧 Body weight increased more than 75% just this week! (10 wks) 覧 Bones are hardening throughout the body. (10 wks) [ More Events ] | New Journal Entry 覧 Fingernails and toenails begin to grow! (10 wks) 覧 The right and left sides of the brain are connecting. (10 wks) 覧 Tiny folds in the skin form unique fingerprints. (10 wks) 覧 The eyes roll downward after stimulating the upper lid. (10 wks) [ Less Events ] | New Journal Entry