I have heard Kathy Wards, my sister in law used it. She always went very late when she took that stuff, like almost 3 weeks over. Subsequent babies were born a couple days late, but the ones she tried to "prepare" for were dangerously close to CS she went so far overdue. Its possible it helps some women, but like anything, it can have the exact reverse effect, it just depends on the person, and in my sister in laws case, it went very backwards from what she was hoping, so I wouldn't use them.
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