Prenatal Development Notes

Prenatal Development: From Zygote to Fetus & Beyond

Recap: Stages of Prenatal Development

  • Zygote: The initial stage after fertilization.

  • Embryo: The developmental stage following the zygote, characterized by rapid cell division and organ formation.

  • Fetus: The final stage of prenatal development, where organs mature and the fetus grows in size.

Age of Viability

  • Definition: The point at which a fetus has a chance of sustaining life outside the womb.

  • Historic Shift: When the instructor first started teaching, the age of viability was around 2525 to 2626 weeks.

  • Current Age: Due to advancements in technology and research, the earliest age of viability is now considered to be 2222 weeks.

  • Significance: This is the earliest point a baby can be born and have a chance of survival.

Fetal Development in the Final Months (Third Trimester)

  • Increasing Chances of Health: In the final three months of pregnancy, every additional day significantly increases the chances of delivering a perfectly healthy and happy fetus.

  • Goal: The primary objective is to keep the baby