The bacteria in yogurt are harmless to humans: They can't cause infection. During pregnancy, your digestive tract slows down to increase the quantity of nutrition available to your baby, explain Murkoff and Mazel. This can increase your risk of constipation, which can increase your risk of hemorrhoids.
Definition of undulating - having a smoothly rising and falling form or outline Definition of undulating - having a smoothly rising and falling form or outline dictionary
Undulation (n.) A motion to and fro, up and down, or from side to side, in any fluid or elastic medium, propagated continuously among its particles, but with no translation of the particles themselves in the direction of the propagation of the wave; a wave motion; a vibration.