References
- Bailit JL. Hyperemesis gravidarium: epidemiologic findings from a large cohort. Am J Obstet Gynecol 2005;193:811–4
- Kallen B. Hyperemesis during pregnancy and delivery outcome: a registry study. Eur J Obstet Gynecol Reprod Biol 1987;26:291–302
- Gadsby R, Barnie-Adshead AM, Jagger C. A prospective study of nausea and vomiting during pregnancy. Br J Gen Pract 1993;43:245–8
- Askling J, Erlandsson G, Kaijser M, et al. Sickness in pregnancy and sex of child. Lancet 1999;354:2053
- Basso O, Olsen J. Sex ratio and twinning in women with hyperemesis or pre-eclampsia. Epidemiology 2001;12:747–9
- del Mar Melero-Montes M, Jick H. Hyperemesis gravidarum and the sex of the offspring. Epidemiology 2001;12:123–4
- Dodds L, Fell DB, Joseph KS, et al. Outcomes of pregnancies complicated by hyperemesis gravidarum. Obstet Gynecol 2006;107:285–92
- Schiff MA, Reed SD, Daling JR. The sex ratio of pregnancies complicated by hospitalisation for hyperemesis gravidarum. BJOG 2004;111:27–30
- Sorensen HT, Thulstrup AM, Mortensen JT, et al. Hyperemesis gravidarum and sex of child. Lancet 2000; 355:407
- Tan PC, Jacob R, Quek KF, Omar SZ. The fetal sex ratio and metabolic, biochemical, haematological and clinical indicators of severity of hyperemesis gravidarum. BJOG 2006;113:733–7
- Hsu CD, Witter FR. Fetal sex and severe hyperemesis gravidarum. Int J Gynaecol Obstet 1993;40:63–4
- Roseboom TJ, Ravelli AC, van der Post JA, Painter RC. Maternal characteristics largely explain poor pregnancy outcome after hyperemesis gravidarum. Eur J Obstet Gynecol Reprod Biol 2011;156:56–9
- Veenendaal MV, van Abeelen AF, Painter RC, et al. Consequences of hyperemesis gravidarum for offspring: a systematic review and meta-analysis. BJOG 2011;118:1302–13
- Rashid M, Rashid MH, Malik F, Herath RP. Hyperemesis gravidarum and fetal gender: a retrospective study. J Obstet Gynaecol 2012;32:475–8
- Melamed N, Yogev Y, Glezerman M. Fetal gender and pregnancy outcome. J Matern Fetal Neonatal Med 2010;23:338–44
- Lao TT, Sahota DS, Suen SS, Law LW. The impact of fetal gender on preterm birth in a southern Chinese population. J Matern Fetal Neonatal Med 2011;24:1440–3
- Sheiner E, Levy A, Katz M, et al. Gender does matter in perinatal medicine. Fetal Diagn Ther 2004;19:366–9
- Zeitlin J, Saurel-Cubizolles MJ, De Mouzon J, et al. Fetal sex and preterm birth: are males at greater risk? Hum Reprod 2002;17:2762–8
- Aibar L, Puertas A, Valverde M, et al. Fetal sex and perinatal outcomes. J Perinat Med 2012;40:271–6
- Danzer H, Braustein GD, Rasor J, et al. Maternal serum human chorionic gonadotropin concentrations and fetal sex prediction. Fertil Steril 1980;34:336–40
- Braunstein GD, Hershman JM. Comparison of serum pituitary thyrotropin and chorionic gonadotropin concentrations throughout pregnancy. J Clin Endocrinol Metab 1976;42:1123–6
- Niebyl JR. Clinical practice. Nausea and vomiting in pregnancy. N Engl J Med 2010; 363:1544–50
- Kauppila A, Jouppila P, Koivisto M, et al. Twin pregnancy. A clinical study of 335 cases. Acta Obstet Gynecol Scand Suppl 1975;44:5–12
- Verberg MF, Gillott DJ, Al-Fardan N, Grudzinskas JG. Hyperemesis gravidarum, a literature review. Hum Reprod Update 2005;11:527–39
- Spinillo A, Capuzzo E, Nicola S, et al. Interaction between fetal gender and risk factors for fetal growth retardation. Am J Obstet Gynecol 1994;171:1273–7
- Vilming B, Nesheim B-I. Hyperemesis gravidarum in a contemporary population in Oslo. Acta Obstet Gynecol Scand 2000;79:640–3
- Ehrenberg HM, Dierker L, Milluzzi C, Mercer BM. Low maternal weight, failure to thrive in pregnancy, and adverse pregnancy outcomes. Am J Obstet Gynecol 2003;189:1726–30
- DeVader SR, Neeley HL, Myles TD, Leet TL. Evaluation of gestational weight gain guidelines for women with normal prepregnancy body mass index. Obstet Gynecol 2007;110:745–51
- Liu Y, Dai W, Dai X, Li Z. Prepregnancy body mass index and gestational weight gain with the outcome of pregnancy: a 13-year study of 292 568 cases in China. Arch Gynecol Obstet 2012;286:905–11
- Munim S, Maheen H. Association of gestational weight gain and pre-pregnancy body mass index with adverse pregnancy outcome. J Coll Physicians Surg Pak 2012;22:694–8