In the first week of pregnancy, conception typically occurs. This marks the union of the egg and sperm, forming a fertilized egg or zygote. The zygote then undergoes a series of divisions as it travels down the fallopian tube toward the uterus. During this early stage, the developing cells are known as blastomeres. The fertilized egg eventually forms a blastocyst, a multicellular structure with an inner cell mass that will become the embryo.
It’s important to note that during this week, a woman may not be aware that she is pregnant, as the process of implantation into the uterus and the release of pregnancy hormones usually occurs a bit later. If you suspect you’re pregnant, it’s advisable to consult with a healthcare professional for guidance.