Beta HCG Calculator for IVF Pregnancy

Calculate HCG doubling time and assess early IVF pregnancy viability

Important Medical Disclaimer

Beta HCG levels and doubling times are general indicators only. Many factors affect HCG levels including multiple pregnancies, vanishing twins, and individual variation. Some viable pregnancies have slower doubling times. Only ultrasound can confirm pregnancy location and viability. Always consult your fertility specialist for medical advice. Report any bleeding, cramping, or severe pain immediately.

Enter Your Beta HCG Results

Transfer Type

First Beta HCG Test

HCG Level (mIU/mL)

Days Post Transfer

Typically tested 9-14 days post transfer

Second Beta HCG Test

HCG Level (mIU/mL)

Days Post Transfer

Usually 48-72 hours after first test

Understanding Beta HCG in IVF

Normal HCG Doubling Times

• <1200 mIU/mL: Should double every 48-72 hours
• 1200-6000 mIU/mL: Doubles every 72-96 hours
• >6000 mIU/mL: Doubles every 96+ hours
• Peak levels: 8-11 weeks, then decline

Expected HCG Ranges Post-Transfer

For Day 5 embryo transfer:

• 9dp5dt (14 DPO): 50-200 mIU/mL
• 11dp5dt (16 DPO): 100-400 mIU/mL
• 14dp5dt (19 DPO): 300-1000 mIU/mL
• 16dp5dt (21 DPO): 600-2000 mIU/mL

Important Considerations

• Single values less important than doubling rate
• Twins/triplets have higher HCG levels
• Vanishing twin can affect doubling time
• Some normal pregnancies have slower rise
• Ectopic pregnancies often have abnormal rise
• PGT-tested embryos may have more predictable HCG

When to Worry

• Doubling time >96 hours in early pregnancy
• Plateauing or declining HCG
• HCG <50 at 14 DPO
• Severe cramping or bleeding
• One-sided pain (ectopic risk)

Beta HCG Reference Chart for IVF

Days Post Transfer	Day 3 Transfer	Day 5 Transfer	Typical Range
7 days	10 DPO	12 DPO	20-50
9 days	12 DPO	14 DPO	50-200
11 days	14 DPO	16 DPO	100-400
14 days	17 DPO	19 DPO	300-1000
16 days	19 DPO	21 DPO	600-2000

*DPO = Days Post Ovulation (equivalent). Wide variation is normal. Single values less important than doubling rate.

Medical Sources & References

• Barnhart et al. (2016). "Differences in Serum HCG Rise between IVF and Spontaneous Pregnancies." Fertility and Sterility, 106(2), 392-397.
• Sung et al. (2016). "Serum hCG-β levels of postovulatory day 12 and 14 in predicting pregnancy outcome." Clinical and Experimental Reproductive Medicine, 43(1), 26-30.
• Morse et al. (2012). "Association between hCG doubling time and outcome in IVF cycles." Journal of Assisted Reproduction, 29(1), 25-29.
• ASRM. (2018). "Early pregnancy monitoring after IVF." Practice Committee Opinion. Fertility and Sterility, 110(7), 1296-1301.
• Chung et al. (2006). "Defining the rise of serum HCG in viable pregnancies achieved through IVF." Human Reproduction, 21(3), 821-828.
• Shamonki et al. (2009). "Logarithmic curves in assessing β-hCG doubling time." Fertility and Sterility, 91(4), 1419-1423.