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Parental periconceptional smoking and male: female ratio of newborn infants. 2002

Misao Fukuda, and Kiyomi Fukuda, and Takashi Shimizu, and Claus Yding Andersen, and Anne Grete Byskov
Fukuda Ladies Clinic, 30-9 Kariya, Ako, 678-0239, Hyogo, Japan. fukuda8767@gem.bekkoame.ne.jp

We assessed whether the smoking habits of parents around the time of conception affects the likelihood of the offspring being male or female. We found that the offspring sex ratio (male to female) was lower when either one or both of the parents smoked more than 20 cigarettes per day compared with couples in which neither of the parents smoked. We found the lowest sex ratio among children whose mothers and fathers both smoked more than 20 cigarettes per day (p<0.0001). Parental periconceptional smoking might be a contributing factor to a lower male to female sex ratio of offspring.

UI MeSH Term Description Entries
D007231 Infant, Newborn An infant during the first 28 days after birth. Neonate,Newborns,Infants, Newborn,Neonates,Newborn,Newborn Infant,Newborn Infants
D008297 Male Males
D009035 Mothers Female parents, human or animal. Mothers' Clubs,Club, Mothers',Clubs, Mothers',Mother,Mother Clubs,Mother's Clubs,Mothers Clubs,Mothers' Club
D010290 Parents Persons functioning as natural, adoptive, or substitute parents. The heading includes the concept of parenthood as well as preparation for becoming a parent. Step-Parents,Parental Age,Parenthood Status,Stepparent,Age, Parental,Ages, Parental,Parent,Parental Ages,Status, Parenthood,Step Parents,Step-Parent,Stepparents
D005220 Fathers Male parents, human or animal. Father
D005260 Female Females
D005306 Fertilization The fusion of a spermatozoon (SPERMATOZOA) with an OVUM thus resulting in the formation of a ZYGOTE. Conception,Fertilization, Delayed,Fertilization, Polyspermic,Conceptions,Delayed Fertilization,Delayed Fertilizations,Fertilizations,Fertilizations, Delayed,Fertilizations, Polyspermic,Polyspermic Fertilization,Polyspermic Fertilizations
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D012907 Smoking Willful or deliberate act of inhaling and exhaling SMOKE from burning substances or agents held by hand. Smoking Behaviors,Smoking Habit,Behavior, Smoking,Behaviors, Smoking,Habit, Smoking,Habits, Smoking,Smoking Behavior,Smoking Habits

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