Imagine your ovaries as a bank account—you’re born with all the eggs you’ll ever have, and there are no deposits, only withdrawals. In your 20s and early 30s, your fertility is like a high-interest savings account—plenty of eggs, good quality, and a high chance of pregnancy. Around age 35, things start to slow down, and by 40, your fertility is in “low-battery” mode, with higher chances of genetic abnormalities in eggs. By 45, spontaneous pregnancy is rare. If you’re thinking of postponing pregnancy, fertility preservation (egg freezing) might be a great option.