Implantation & Nausea: Early Pregnancy Signs Explained

Nausea ("morning sickness") often begins around implantation (6–12 days post-ovulation) or shortly after, driven by rising hCG and estrogen. However, implantation itself does not directly cause nausea.

Key Points

• Hormonal surge (hCG, estrogen, progesterone) affects the GI tract and brain's vomiting center.
• Not all women experience nausea; its absence doesn't rule out pregnancy.
• Nausea typically peaks at 8–10 weeks and resolves by 12–14 weeks for most.

If nausea is severe (hyperemesis gravidarum—persistent vomiting, weight loss, dehydration), seek medical care promptly.