by SM Grandi · 2023 · Cited by 9 — Women who give birth to male infants, regardless of number, are not at increased risk of all-cause and cause-specific mortality.

Jul 22, 2025 — A child's biological sex at birth may not be a 50-50 toss-up, according to a new study from Harvard T.H. Chan School of Public Health.

by C Smith · 1978 · Cited by 227 — Mothers of 32 5–20 mo old firstborn infants were videotaped playing with a 6-mo-old "actor baby." 2 female infants and 2 males appeared equ

A baby's biological sex is determined by the two sex chromosomes in the egg and sperm. Eggs always have an X chromosome, and sperm have either an X or a Y ...

Aug 27, 2024 — Atypical genitalia, formerly called ambiguous genitalia, is a rare condition in which an infant's genitals don't appear to be clearly male or female on the ...

May 6, 2025 — An ultrasound is the most common way to find out your baby's sex – usually between 18 and 22 weeks, though sometimes babies don't cooperate for ...

Jan 29, 2025 — A baby's sex is determined at conception, but sex organs develop later on, particularly between weeks 7 and 12 of pregnancy.

Sex assignment is the discernment of an infant's sex, typically made at birth based on an examination of the newborn's external genitalia by a healthcare ...

by E Elsmén · 2004 · Cited by 85 — Newborn boys have higher morbidity and mortality than girls. Several studies have shown that male newborn sex is an independent risk factor

by S Lee · 1993 — Choice of baby's sex. S. Lee. S. Lee. Affiliations: IVF Unit, AMI Chiltern, Gt Missenden Buckinghamshire, UK. Search for articles by this author.

by SM Grandi · 2023 · Cited by 9 — We found that the number of male infants that a woman gives birth to was not associated with an increased risk of all-cause and cause-specifi

Jul 18, 2025 — The probability of conceiving and birthing a male or female child is theoretically about 50-50. This is because at least initially, equal proportions of sperm ...

by HE Laue · 2022 · Cited by 44 — We aimed to identify sex-specific prospective associations between the early-life gut microbiome and preschool-age neurobehavior.

May 5, 2003 — The methods range from the natural (such as using particular positions during intercourse) to the high-tech (such as sorting sperm).

by GA Wasserman · 1985 · Cited by 38 — Sex differences in infant touching and proximity seeking appeared, dependent here upon the level of interaction, with girls higher on bot

Jan 23, 2020 — Your doctor can use different tests to tell you the sex of your baby starting at around 10 weeks of pregnancy. Often, people find out via a routine ultrasound ...

by J Hua · 2016 · Cited by 18 — In 2001, the Chinese government loosened its birth control policy and allowed parents to have a second child if both parents were from a one-chi

When can you find out the sex of your baby? Listen to Kaiser Permanente's professionals tell you all you need to know.

by A Spinillo · 2009 · Cited by 102 — Aim: To evaluate the effect of the interaction between fetal sex and obstetric variables on the risk of neurodevelopmental impairment amon

Feb 24, 2022 — Research shows that a woman can resume penetrative sexual activity as early as two weeks postpartum based on her own comfort level and desire.