How can you make your 4 month old baby poop?

Speak to your family doctor first. Often, its normal for babies to occasionally not poop for a day or two. But if this happens often or if the delay is longer, there may be more serious health or dietary issues.

Otherwise, glycerin suppositories suitable for infants work wonders. You typically will get lots of poop within minutes of administering the suppository. But check with a doctor first.