Pregnant women who are positive for Hashimoto's thyroiditis may have decreased thyroid function or the gland may fail entirely.  If a woman is TPOAb-positive, clinicians can inform her of the risks for themselves and their infants if they go untreated. "Thyroid peroxidase antibodies (TPOAb) are detected in 10% of pregnant women," which presents risks to those pregnancies.  Women who have low thyroid function that has not been stabilized are at greater risk of having an infant with: low birth weight, neonatal respiratory distress, hydrocephalus , hypospadias , miscarriage, and preterm delivery.   The embryo transplantion rate and successful pregnancy outcomes are improved when Hashimoto's is treated.  Recommendations are to only treat pregnant women who are TPOAb-positive throughout the entirety of their pregnancies and to screen all pregnant women for thyroid levels.  Close cooperation between the endocrinologist and obstetrician benefits the woman and the infant.    The Endocrine Society recommends screening in pregnant women who are considered high-risk for thyroid autoimmune disease.