Letter to the Editor

References

• Mulic-Lutvica A, Axelsson O. Postpartum ultrasound in women with postpartum endometritis, after cesarean section and after manual evacuation of the placenta. Acta Obstet Gynecol. 2007; 86: 210–7
   PubMed Web of Science ®Google Scholar
• Mulic-Lutvica A, Bakos O, Bekuretzion M, Axelsson O. Ultrasonic evaluation of the uterus and uterine cavity after normal, vaginal delivery. Ultrasound Obstet Gynecol. 2001; 18: 491–8
   PubMed Web of Science ®Google Scholar
• Mulic-Lutvica A, Axelsson O. Ultrasound finding of an echogenic mass in women with secondary postpartum hemorrhage is associated with retained placental tissue. Ultrasound Obstet Gynecol. 2006; 28(3)312–9
   PubMed Web of Science ®Google Scholar
• Mulic-Lutvica A, Axelsson O. Postpartum ultrasound in women with postpartum endometritis, after cesarean section and after manual evacuation of the placenta. Acta Obstet Gynecol Scand. 2007; 86(2)210–7
   Web of Science ®Google Scholar
• Romem Y, Artal R. C-reactive protein in pregnancy and in the postpartum period. Am J Obstet Gynecol. 1985; 151: 380–3
   PubMed Web of Science ®Google Scholar
• Kääpä P, Koistinen E. Maternal and neonatal C-reactive protein after interventions during delivery. Acta Obstet Gynecol Scand. 1993; 72: 543–546
   PubMed Web of Science ®Google Scholar
• Elsmen E, Kallen K, Marsal K, Hellstrom-Westas L. Fetal gender and gestational-age-related incidence of pre-eclampsia. Acta Obstet Gynecol Scand. 2006; 85: 1285–91
   PubMed Web of Science ®Google Scholar
• Chan P, Brown M, Simpson JM, Davis G. Proteinuria in pre-eclampsia: how much matters?. BJOG. 2005; 112: 280–5
   PubMed Web of Science ®Google Scholar
• Ness RB, Roberts JM. Heterogeneous causes constituting the single syndrome of pre-eclampsia:a hypothesis and its implications. Am J Obstet Gynecol. 1996; 175: 1365–70
   PubMed Web of Science ®Google Scholar
• Vatten LJ, Skjaerven R. Is pre-eclampsia more than one disease?. BJOG. 2004; 111: 298–302
   PubMed Web of Science ®Google Scholar
• James WH. Sex ratios of offspring and causes of placental pathology. Hum Reprod. 1995; 10: 1403–6
   PubMed Web of Science ®Google Scholar
• Vatten LJ, Skjaerven R. Offspring sex and pregnancy outcome by length of gestation. Early Hum Dev. 2004; 76: 47–54
   PubMed Web of Science ®Google Scholar
• Kramer MS. Determinants of low birthweight: methodological assessment and meta-analysis. Bull WHO. 1987; 65: 663–757
   PubMed Web of Science ®Google Scholar
• Spinillo A, Capuzzo E, Nicola S, Colonna L, Iasci A, Zara C. Interaction between fetal gender and risk factors for fetal growth retardation. Am J Obstet Gynecol. 1994; 171: 1273–7
   PubMed Web of Science ®Google Scholar
• Schiff E, Friedman SA, Mercer BM, Sibai BM. Fetal lung maturity is not accelerated in pre-eclamptic pregnancies. Am J Obstet Gynecol. 169:1096–101.
   Google Scholar
• Hall DR. Early onset, severe pre-eclampsia and HELLP syndrome: sex of infants. J Obstet Gynaecol. 2002; 22: 636
   Google Scholar
• James WH. Duration of pregnancy and sex of offspring. Am J Obstet Gynecol. 2004; 190: 1169–70
   Google Scholar
• James WH. Evidence that mammalian sex ratios at birth are partially controlled by parental hormone levels at the time of conception. J Theor Biol. 1996; 180: 271–86
   PubMed Web of Science ®Google Scholar
• James WH. Further evidence that mammalian sex ratios at birth are partially controlled by parental hormone levels around the time of conception. Hum Reprod. 2004; 19: 1250–6
   PubMed Web of Science ®Google Scholar
• James WH. The sex ratio of pregnancies complicated by hospitalization for hyperemesis gravidarum. BJOG. 2004; 111: 636
   Google Scholar
• Campbell DM, MacGillivray I, Carr-Hill R, Samphier M. Fetal sex and pre-eclampsia in primigravidae. Br J Obstet Gynaecol. 1983; 90: 26–7
   PubMedGoogle Scholar
• Khong TY, Staples A, Chan AS, Keane RJ, Wilkinson CS. Pregnancies complicated by retained placenta: sex ratio and relation to pre-eclampsia. Placenta. 1998; 19: 577–80
   PubMed Web of Science ®Google Scholar
• Ros HS, Cnattingius S, Lipworth L. Comparison of risk factors for pre-eclampsia and gestational hypertension in a population-based cohort study. Am J Epidemiol. 1998; 147: 1062–70
   PubMed Web of Science ®Google Scholar
• Naeye RL, Demers LM. Differing effects of fetal sex on pregnancy and its outcome. Am J Med Genet Suppl. 1987; 3: 67–74
   PubMedGoogle Scholar
• Elsmen E, Pupp IH, Hellstrom-Westas L. Preterm male infants need more initial respiratory and circulatory support than female infants. Acta Paediatr. 2004; 93: 529–33
   PubMed Web of Science ®Google Scholar
• Wen SW, Goldenberg RL, Cutter GR, Hoffman HJ, Cliver SP. Intrauterine growth retardation and preterm delivery: prenatal risk factors in an indigent population. Am J Obstet Gynecol. 1990; 162: 213–8
   PubMed Web of Science ®Google Scholar
• Shenhav S, Gemer O, Sassoon E, Volodarsky M, Peled R, Segal S. Mid trimester triple test levels in early and late onset severe pre-eclampsia. Prenatal Diagn. 2002; 22: 579–82
   PubMed Web of Science ®Google Scholar
• Chu H, Chen X. A study on the relationship between serum free alpha-subunit of human chorionic gonadotropin and pregnancy induced hypertension. Zhonghua Fu Chan Ke Za Zhi. 2000; 35: 148–50
   Google Scholar
• Stamilio DM, Sehdev HM, Morgan MA, Propert K, Macones GA. Can antenatal clinical and biochemical markers predict the development of severe pre-eclampsia?. Am J Obstet Gynecol. 2000; 182: 589–94
   PubMed Web of Science ®Google Scholar
• Luckas MJ, Sandland R, Hawe J, Neilsen JP, McFadyen IR, Meekins JW. Fetal growth retardation and second trimester maternal serum human chorionic gonadotrophin levels. Placenta. 1998; 19: 143–7
   PubMed Web of Science ®Google Scholar
• Lee LC, Sheu BC, Shau WY, Liu DM, Lai TJ, Lee YH, et al. Mid trimester beta-hCG levels incorporated in a multifactorial model for the prediction of severe pre-eclampsia. Prenatal Diagn. 2000; 20: 738–43
   PubMed Web of Science ®Google Scholar
• Wald NJ, Morris JK. Multiple marker second trimester serum screening for pre-eclampsia. J Med Screen. 2001; 8: 65–8
   PubMed Web of Science ®Google Scholar
• Jiracek S, Joura EA, Tempfer C, Knofler M, Husslein P, Zeisler H. Elevated serum concentrations of androgens in women with pregnancy induced hypertension. Wien Klin Wschr. 2003; 115: 162–6
   Google Scholar
• Serin IS, Kula M, Basbug M, Unluhizarci K, Gucer S, Tayyer M. Androgen levels of pre-eclamptic patients in the third trimester of pregnancy and six weeks after delivery. Acta Obstet Gynecol Scand. 2005; 84: 117–21
   Google Scholar
• Carlsen SM, Romundstad P, Jacobsen G. Early second trimester maternal hyperandrogenemia and subsequent pre-eclampsia: a prospective study. Acta Obstet Gynecol Scand. 2005; 84: 117–21
   PubMed Web of Science ®Google Scholar
• Kristiansen P, Wang J. Reproductive hormones and blood pressure during pregnancy. Hum Reprod. 2001; 16: 13–17
   Google Scholar