When is the hardest age to get pregnant?


Editorial team Published on

Natural pregnancy becomes very difficult after age 43 to 45, with a sharp acceleration in difficulty and egg chromosome abnormalities occurring after age 37 and a major drop-off by age 40.

Fertility Decline by Age

  • Under 30: Highest chance of conception, with about an 85% chance of getting pregnant within one year of trying.
  • Age 30 to 34: A slow decline begins, with roughly a 20% chance per monthly cycle.
  • Age 35 to 39: Fertility declines faster after age 37, dropping the one-year pregnancy success rate to around 52%.
  • Age 40 to 44: Conception drops significantly, with a monthly chance falling below 10% and a one-year success rate near 44% or lower.
  • Age 45 and older: Natural unassisted pregnancy is very rare, and most successful pregnancies in this bracket require medical intervention or donor eggs. According to discussions on platforms like Reddit, experiences vary, but opinions on BabyBumps converge on the consensus that unassisted conception past 43 is exceptionally hard.

Why Conception Becomes Harder

  • Fewer Eggs: Women are born with a fixed number of eggs that naturally deplete over time.
  • Lower Quality: Older eggs have higher rates of chromosomal abnormalities (aneuploidy), making fertilization and healthy implantation less likely.
  • Medical Guidance: The American College of Obstetricians and Gynecologists (ACOG) recommends fertility evaluations if you are over 35 and have not conceived after 6 months of unprotected sex, or immediately if you are over 40.