Two Weeks Pregnant

Changes Inside Your Body When You're "2 Weeks Pregnant"

During your "second week of pregnancy," your last period is finished, and now your uterus is building a new inner layer of endometrium to cushion and nourish your soon-to-be-conceived baby. At this point in your cycle, about 20 ova (eggs) in the ovaries begin to ripen and occupy fluid-filled sacs called follicles.
 
Each month, one of these follicles matures and then ruptures, releasing an egg from the ovary that will travel down the fallopian tube, where it awaits fertilization. This release of the egg is known as ovulation.
 
Ovulation
Ovulation takes place about 14 days before the end of your cycle, which is toward the end of the "second week of pregnancy" or the beginning of the "third week of pregnancy." Ovulation is the time that you are most fertile. Once an egg is released from the ovary, there is only a 12- to 24-hour period in which it can be fertilized.
 
You will experience a rise in your estrogen levels accompanying ovulation, making your body more receptive to a pregnancy. This is why many women find that they are at their peak level of energy and creativity during this week of their cycle.
 
Fertilization
Fertilization occurs when the sperm and egg unite in the fallopian tube to form a one-celled entity called a zygote. If more than one egg is released and fertilized, you may have multiple zygotes, which would result in twins, triplets, and so forth. The zygote has 46 chromosomes -- 23 from you and 23 from your partner. These chromosomes contain genetic material that will determine your baby's sex and traits, such as:
 
  • Eye color
  • Hair color
  • Height
  • Facial features
  • Intelligence
  • Personality.
     
Soon after fertilization, the zygote will travel down one of your fallopian tubes toward the uterus. At the same time, it will begin dividing rapidly to form a cluster of cells resembling a tiny raspberry. The inner group of cells will become the embryo. The outer group of cells will become the membranes that nourish and protect it.
 
At this point, the developing baby is tinier than a grain of rice. But even at this stage, the rapidly dividing cells are in the process of forming various body systems, including the digestive system and the immune system.
 
Pregnancy and Pain

Week by Week Pregnancy

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