Flow measurement is the quantification of bulk fluid movement. Flow can be measured in a variety of ways. Positive-displacement flow meters accumulate a fixed volume of fluid and then count the number of times the volume is filled to measure flow.
The following herbs have been rated Likely Safe or Possibly Safe for use during pregnancy:4. 1  Red Raspberry Leaf â Rich in iron, this herb has helped tone the uterus, increase milk production, decrease nausea, and ease labor pains. 2  Peppermint Leaf â Helpful in relieving nausea/morning sickness and flatulence.
Pregnancy teas usually include ingredients such as alfalfa, fennel seed, lemongrass leaf, lemon verbena, nettle leaf, rosehips, and strawberry leaf. Not all of these are safe to take during pregnancy. For example, nettle leaf (also known as stinging nettle leaf) stimulates the uterus and can cause miscarriage.