Based on a 28-day cycle, this week is the approximate date of conception. Ovulation occurs, typically around day 14 of a 28-day cycle, but it can vary. Some women experience a twinge of abdominal pain or a feeling of pressure – known as mittelschmerz (literally "middle pain") – around the time of ovulation. This sensation is associated with the release of the egg from the ovary. The ovum (egg) is only viable for about 24 hours, so fertilization must occur within this window. This is why timing intercourse around ovulation is key for couples trying to conceive. Sperm can survive in the female reproductive tract for several days (up to 5), so having intercourse in the days leading up to ovulation can also increase the chances of fertilization. If fertilization occurs, the sperm will meet and penetrate the egg in the fallopian tube. The fertilized egg (zygote) then begins its journey down the fallopian tube toward the uterus. Once it reaches the uterus, the embryo will implant itself in the uterine wall. This implantation process is crucial. The embryo sends out tiny "roots" that will eventually connect with your blood supply, providing the nutrients and oxygen necessary for its growth and development. This connection will form the basis of the placenta, the organ that sustains the baby throughout pregnancy.
Size Comparison
Poppy seed
Weight
Less than 1 gram
Length
About 0.6 inches (1.5 cm)
Trimester
First Trimester