-
Maternal thyroid function in multifetal pregnancies before and after fetal reduction.
Ogueh O, Hawkins AP, Abbas A, Carter GD, Nicolaides KH, Johnson MR.
J Endocrin 2000;164:7-11. -
Maternal serum inhibin-A and free beta-hCG concentrations in trisomy 21 pregnancies at 10-14 weeks of gestation.
Noble PL, Wallace EM, Snijders RJ, Groome NP, Nicolaides KH.
BJOG 1997;104:367-71.