Why are boys more likely to be preterm than girls? Plus other related conundrums in human reproduction

Human Reproduction

Volumn 15, Issue 10, 2000, Pages 2108-2111

  James, W H ^a  

^a UNIVERSITY COLLEGE LONDON   (United Kingdom)

Author keywords

Coital rate; Duration of gestation; Hormone concentration; Sex ratio at birth; Time of insemination within the cycle

Indexed keywords

CHORIONIC GONADOTROPIN; ESTROGEN; PROGESTERONE; TESTOSTERONE;

CONCEPTION; EMPIRICISM; FERTILITY; FETUS WEIGHT; FOLLICULAR PHASE; GESTATION PERIOD; HORMONE BLOOD LEVEL; HUMAN; INTRAUTERINE INSEMINATION; MORTALITY; NEWBORN MORBIDITY; NONHUMAN; NOTE; PREMATURE LABOR; PREMATURITY; REGRESSION ANALYSIS; SEX RATIO;

EID: 0033772189     PISSN: 02681161     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Note

References (27)

1. Effects of fetal sex on risk of very preterm birth in twins
2. Excess males in preterm birth: Interactions with gestational age, race and multiple birth
3. The meaning of binomial distribution
4. Female and male human embryo growth rates are similar before the eight cell stage
5. Natural family planning and sex selection: Fact or fiction
6. Association of the type and time of insemination within the menstrual cycle and the human sex ratio at birth
7. Gender of infants conceived on different days of the menstrual cycle
8. Cycle day of insemination, coital rate and sex ratio
9. The current status of Weinberg's Differential Rule
10. Cycle day of insemination, sex ratio of offspring and duration of gestation
11. Evidence that mammalian sex ratios at birth are partially controlled by parental hormone levels at the time of conception
12. Follicular phase length, time of insemination, mean cycle length, season of mother's birth and sex ratio of offspring
13. A potential mechanism for sex ratio variation in mammals
14. Coital rates and sex ratios
15. Further evidence relating offspring sex ratios to parental hormone levels around the time of conception
16. Analysing data on the sex ratio of human births by cycle day of conception
17. Birth weight and gestation time in relation to maternal age, parity and infant survival
18. Does a discrepancy between gestational age determined by biparietal diameter and last menstrual period sometimes signify early intrauterine growth retardation?
19. Sex differences in length of gestation in mammals
20. An analysis of birth weight by gestational age of infants born in England and Wales, 1967-71
21. Normal range growth curves for fetal biparietal diameter, occipito frontal diameter, mean abdominal diameters and femur length
22. The origins of fluctuations in the human secondary sex ratio
23. Effect of timing of artificial insemination on sex ratio
24. Long term effects of postovulatory aging of mouse oocytes on offspring: A two generational study
25. The sex of the baby may be related to the length of the follicular phase in the conception cycle
26. Timing of sexual intercourse in relation to ovulation. Effects on the probability of conception, survival of the pregnancy and sex of the baby