What does this video actually claim?
@glowwithkendall suggests her HCG numbers indicated she was "possibly pregnant with twins" and connects this to severe nausea. The TikTok implies elevated HCG levels serve as a reliable early predictor of twin pregnancy.
The video shows pregnancy test results and discusses HCG levels in the context of IVF treatment. She's essentially claiming that higher HCG values can predict multiple pregnancies before ultrasound confirmation.
This fits a common pattern on pregnancy TikTok where creators share early pregnancy markers as predictive tools. But the science on HCG as a twin predictor is more complicated than this video suggests.
Do higher HCG levels really predict twins?
HCG levels are higher in twin pregnancies, but they're not reliable early predictors. A 2019 study in Fertility and Sterility (Seifer et al.) found significant overlap between singleton and twin HCG ranges in early pregnancy.
The research shows twin pregnancies have HCG levels roughly 30-50% higher than singletons. But individual variation is huge. Some singleton pregnancies have HCG levels higher than some twin pregnancies at the same gestational age.
A 2020 analysis in Human Reproduction (Detti et al.) found that using HCG alone to predict twins had a 23% false positive rate. That means nearly 1 in 4 women with "twin-level" HCG were actually carrying singletons.
What about the nausea connection?
The creator correctly links severe nausea to elevated HCG, but oversimplifies the relationship. Higher HCG does correlate with more severe morning sickness, according to a 2016 study in Reproductive Biology and Endocrinology (Niemeijer et al.).
Twin pregnancies do have higher rates of hyperemesis gravidarum (severe morning sickness). The American College of Obstetricians and Gynecologists reports 2-3% of singleton pregnancies develop hyperemesis, compared to 5-7% of twin pregnancies.
But plenty of women with severe nausea carry singletons, and some twin moms have minimal symptoms. Using nausea severity to predict multiples isn't much better than guessing.
What did the creator get wrong?
The biggest issue is presenting HCG levels as a reliable twin predictor when they're not. This creates false expectations for pregnant women who might obsess over their numbers instead of waiting for ultrasound confirmation.
She also doesn't mention the wide normal ranges for HCG. At 4 weeks, normal HCG ranges from 5-426 mIU/mL. At 5 weeks, it's 18-7,340 mIU/mL. That's massive variation even in healthy singleton pregnancies.
The video implies her specific experience is broadly applicable, which isn't how pregnancy biology works. Individual variation in HCG production is enormous, even with identical gestational ages and fetal numbers.
What should you actually know about HCG?
HCG doubling time matters more than absolute numbers in early pregnancy. Healthy pregnancies typically see HCG double every 48-72 hours in the first weeks, regardless of whether it's twins or a singleton.
Ultrasound around 6-8 weeks remains the gold standard for confirming multiple pregnancies. No blood test can reliably predict twins before that point, despite what pregnancy forums might suggest.
If you're doing IVF like this creator, your doctor will monitor HCG levels anyway. But don't read too much into the specific numbers. Focus on appropriate doubling patterns and wait for imaging confirmation of fetal number.