Why did my pregnancy hormone (hCG) levels rise so quickly at first?going from 890 to 2,500 in two days?and then slow down to 9,000 four days later, after I took the fertility medication Letrozole on days 3 to 7 of my cycle following my last period on December 10th?
What you are experiencing is a very normal pattern. Early in pregnancy, hCG levels rise rapidly, often doubling every 48 hours. However, as the numbers get higher?especially after passing 1,200 and 6,000 mIU/mL?it is medically expected for the doubling rate to slow down to every 72 to 96 hours. Your rise from 2,500 to 9,000 over four days is beautifully on track. Letrozole helped you conceive, and this slowdown is just how healthy pregnancies naturally progress. I recommend sharing these reassuring results with your doctor to schedule an ultrasound.