Earth and human.
The high rate comes from estimating the number of miscarriages that happen in the first 6 weeks, often before someone knows they are pregnant and the miscarriage is dismissed as a heavy or late period.
The traditional miscarriage stat comes from only looking at known pregnancies, and even it is likely higher than most people realize.
Regardless which stat you use, miscarriages are way more common than most people think.
It's 16 in Minnesota and 17 in New York, but 18 in North Dakota. Let's not act like a higher age of consent is directly tied to progressive policies.