Prenatal Development

By Saucin

  • Start period of the zygote

    The period of the zygote is quite brief, lasting for about four days. Around the fifth day, the mass of cells becomes known as a blastocyst. The germinal period will last approximately fourteen days, after which the embryonic period will begin

  • End period of the zygote

  • Start period of embryo

  • End period of the embryo

  • Start of the fetus

  • End of the fetus

  • first trimester

  • second trimester

  • Third trimester

  • week of sex detection

  • week of viable birth

  • Full term pregnancy