The latest research suggests that drinking caffeinated drinks during pregnancy will raise your risk of giving birth to baby with a lower birth weight.

Though caffeine has been linked to having adverse effects on pregnant women, a limit has been set on what pregnant would should consume, if they can’t do without a caffeine kick. But, there have been a fair share of conflicting reports from differing health organization as to what pregnant women can safely consume. The World Health Organization recommended a limit of 300 milligrams of caffeine a day (which is about three 8-oz. cups of regularly brewed coffee), while the American College of Obstetricians and Gynecologists recommended 200 milligrams per day in 2010. The 200 milligram limit, they stated, would not increase the risk of miscarriage or preterm birth.

But this latest study, which was published in the BMC Medicine journal, found that a child lost between three-quarters of an ounce to a full ounce in birth weight for every 100 milligrams of average daily caffeine intake from all sources by the mother. Researchers collected data on nearly 60,000 pregnancies over a 10-year period. And while they did find an association between caffeine and low birth weight, a correlation with caffeine consumption and the risk of preterm birth could not be found.

The study author, Dr. Verena Sengpiel of the Sahlgrenska University Hospital in Sweden, said that the findings were not definitive because the study was observational — so that correlation (in this case) does not equal cause. What Sengpiel is able to suggest, though, is that women should put their caffeine consumption “on pause” while pregnant, or at least stay below two cups of coffee per day.

Did you drink caffeine during your pregnancy?

Plus, more from The Bump:

Will Caffeine During Pregnancy Harm Baby?

Could Caffeine Put My Fertility at Risk?

What to Avoid During Pregnancy (and How Not to Miss It Too Much)

So is it okay for pregnant and breastfeeding moms to drink caffeine? Here’s the deal. A new study says that pregnant and breastfeeding moms aren’t messing with their babies’ sleep cycles by drinking caffeine. In the study published in Pediatrics, researchers looked at 885 infants born in 2004 in Brazil. Their findings showed that although women who drank a lot of caffeine had babies who were more restless at night, the difference was so small that it might have been due to other factors in the groups and not just caffeine intake.

Researchers asked the mothers about their babies’ sleeping habits right after birth and three months later. They found that 20 percent of moms drank a lot of caffeine (over 300 mg, which is about two to three  12-ounce cups), but while they don’t know why moms’ caffeine habits don’t have as big of an effect on their babies’ sleeping patterns as other things, they believe that some of these babies have developed a tolerance.

But before you grab a trenta at Starbucks, beware that some studies suggest drinking more than 300 mg of caffeine per day could put you at higher risk for miscarriage and baby at higher risk for birth defects. And one recent report suggests babies of moms who drink more than three cups of coffee per day while breastfeeding could become jittery and irritable.

Long story short? Have a cup or two, but stay away from a triple shot latte for a while.

Do you limit your caffeine intake? How many cups of coffee or tea do you drink a day?