Mothers should wait at least one year between birth and pregnancy to reduce health risks to mother and child, a new study states.
But researchers say they do not have to wait as long as the 1
Small gaps between pregnancies threaten prematurity, infancy, and infant and maternal mortality.
The researchers hope the results are "reassuring" for older women.
Senior Study Author Dr. Wendy Norman said it was "encouraging news" for women over 35 planning their families.
"Older mothers have excellent evidence for the first time to determine their children's distance," she said.
"Achieving this optimal one-year interval should be feasible for many women and clearly worthwhile to reduce the risk of complications."
The study of nearly 150,000 births in Canada from the University of British Columbia (UBC) and the Harvard TH Chan School of Public Health is published in JAMA Internal Medicine.
The study found that the ideal time between birth and re-pregnancy is 12 to 18 months
The current World Health Organization guidelines recommend an ideal interval of 24 months and not less than 18 months.
The researchers also found:
- Pregnancy less than 12 months after birth was associated with risks to women for all ages
- There were risks to the mother only for women over age 35, while risks to the Children were found for all women, but were greatest for those between the ages of 20 and 34
- Women over 35 who became pregnant six months after an earlier birth had a 1.2% risk of maternal mortality or disease (12 cases per 1000 pregnancies)  Waiting 18 months between pregnancies reduced the risk to 0.5% (five cases per 1,000)
- Young women who became pregnant six months after premature birth had a risk of 8, 5% premature birth
- They waited 18 months between pregnancies
The lead author of the study, Laura Schummers, said: "Our study found increased risks for mother and child, when pregnancies are tight, even for women over 35 years.
"The findings for older women are part of this. This is especially important as older women tend to tighten their pregnancies and often do so intentionally."
The study examined only a woman's population – in Canada – it's unclear How true would that be worldwide.
The researcher Sonia Hernandez-Diaz said the results indicated different risks for each age group.
"Short absences may reflect unplanned pregnancies, especially in young women.
" Whether the increased risks are due to the fact that our bodies do not have time to recover when we get pregnant shortly after birth, or factors Inappropriate prenatal treatment, the recommendation could be the same: Improve access to postpartum prevention or abstain from unprotected sexual intercourse with a male partner after childbirth. "
Mandy Forrester, of the Royal College of Midwives, said the study was" useful research and builds on earlier research into the birth intervals. "
" Ultimately, it will be a woman's choice, no matter how old they are, how long they go between their pregnancies. Importantly, they are aware of evidence surrounding the birth interval and make their choices armed with the right information.
"Healthcare professionals will always support a woman in her choice who deals with what's right for her and her pregnancy."
She said that women needed access to contraceptive advice to allow them to have their births Distribute their choice, but said in specialized family planning service provision in the UK was "patchy, with family physicians often offering only oral contraception."
"Specialized services should be available to all women."