CINECA IRIS Institutional Research Information System
IRIS è la piattaforma adottata dall’Università degli Studi di Udine per gestire l’archivio aperto dei prodotti della ricerca. L’archivio contiene articoli, contributi in volume, monografie, interventi pubblicati in atti di convegno, Tesi di dottorato e altri materiali.
EnglishBACKGROUND:Less than optimal reproductive conditions may be associated with a secondary sex ratio biased towards females. Body weight represents a critical determinant of reproduction. Accordingly, we evaluated whether preconception body weight and weight gain during pregnancy influence the sex ratio of human offspring.METHODS:A retrospective study was performed on 10 239 births in 1997-2001. Time of conception, preconception body weight and net weight gain during pregnancy were obtained for 9284 pregnancies.RESULTS:The secondary sex ratio of mothers in the lowest quartile of pre-pregnancy body weight (<54.6 kg) was lower than that of the other three quartiles (0.497 versus 0.525; P < 0.01). In contrast, the sex ratio of children born by the women in the highest quartile of weight gain during pregnancy appeared lower than that of the first three quartiles (0.493 versus 0.516; P = 0.054).CONCLUSIONS:A low pre-pregnancy weight and a greater weight gain during pregnancy are both associated with a reduced secondary sex ratio. These data indicate that in women with non-optimal reproductive/metabolic conditions, a greater attrition is exerted on male than on female offspring.
Influences of maternal weight on the secondary sex ratio of human offspring / Cagnacci A; Renzi A; Arangino S; Alessandrini C; Volpe A.. - In: HUMAN REPRODUCTION. - ISSN 0268-1161. - STAMPA. - 19(2)(2004), pp. 442-444.
| Titolo: | Influences of maternal weight on the secondary sex ratio of human offspring |
| Autori: | |
| Data di pubblicazione: | 2004 |
| Rivista: | |
| Citazione: | Influences of maternal weight on the secondary sex ratio of human offspring / Cagnacci A; Renzi A; Arangino S; Alessandrini C; Volpe A.. - In: HUMAN REPRODUCTION. - ISSN 0268-1161. - STAMPA. - 19(2)(2004), pp. 442-444. |
| Abstract: | BACKGROUND:Less than optimal reproductive conditions may be associated with a secondary sex ratio biased towards females. Body weight represents a critical determinant of reproduction. Accordingly, we evaluated whether preconception body weight and weight gain during pregnancy influence the sex ratio of human offspring.METHODS:A retrospective study was performed on 10 239 births in 1997-2001. Time of conception, preconception body weight and net weight gain during pregnancy were obtained for 9284 pregnancies.RESULTS:The secondary sex ratio of mothers in the lowest quartile of pre-pregnancy body weight (<54.6 kg) was lower than that of the other three quartiles (0.497 versus 0.525; P < 0.01). In contrast, the sex ratio of children born by the women in the highest quartile of weight gain during pregnancy appeared lower than that of the first three quartiles (0.493 versus 0.516; P = 0.054).CONCLUSIONS:A low pre-pregnancy weight and a greater weight gain during pregnancy are both associated with a reduced secondary sex ratio. These data indicate that in women with non-optimal reproductive/metabolic conditions, a greater attrition is exerted on male than on female offspring. |
| Handle: | http://hdl.handle.net/11390/1105785 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Hum Reprod 2004 sex ratio mother weight.pdf | Versione Editoriale (PDF) | Non pubblico | Accesso ristretto Richiedi una copia |
http://hdl.handle.net/11390/1105785
Copyright © 2021