Fertilization is the moment when the sperm and egg unite to form a fertilized egg called a zygote. This process happens in one of the fallopian tubes. Over the next days, the zygote travels down the fallopian tube, where it transforms into a morula and later into a blastocyst, and once it reaches the uterus, implants itself into the uterine lining.
Sources:
- UCSF Health. Conception: How It Works. https://www.ucsfhealth.org/education/conception-how-it-works (accessed 3. August 2020)
- Mayo Clinic. Pregnancy week by week. https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/multimedia/fertilization-and-implantation/img-20008656 (accessed 3. August 2020)
- WebMD. Pregnancy and Conception. https://www.webmd.com/baby/understanding-conception (accessed 3. August 2020)
