Regarding thyme tea it does promote menstrual cramping & menstrual cycle. It is NOT recommended for women who are pregnant and can cause problems.
Red Raspberry Leaf is a common herb to use during pregnancy and tones the uterus, and the other is Black Cohosh for inducing labor.
As with any herb, you must use extreme caution, and do so under medical advice and with medical help.
We do not promote the use of herbs during pregnancy without a midwife or medical practitioner. Please consult them before taking herbs to induce labour.