(WTNH) – A study released by the Centers for Disease Control and Prevention found that nearly one third of women space out their children too close.

According to the study, 30 percent of women became pregnant again within 18 months of having a child.

“This is actually pretty high and very problematic,” said Heike Thiel de Bocanegra, a reproductive researcher at the University of California, San Francisco, who was not involved with this study.

Some experts say it’s best to give the body at least 18 months to recover after having a baby. They say that will increase the chances that the next child is healthy and makes it to full term.

According to the government study, most pregnancies are spaced out about two years, five months.

ABC News contributed to this report. Click here to read more about the study.