None of these is well known or predictable in action and use of any herb or other supplement is a personal experiment. It would be wise to only add one thing at a time and to be wary of unwanted side effects so it can be stopped at once if there is a problem. Better still, if you want to try herbal therapy, would be to consult with an herbalist, homeopath, Chinese medicine doctor or naturopath. Don't forget to tell your regular doctor that you are taking herbs because they are medicines and can interact with other prescribed medicines or have side effects. Phytoestrogens as in soy products are very popular these days.
Some women find that they help.
Flax and fennel are other sources. The signs of surgical menopause are the same as those of natural menopause. While the individual symptoms manifest sporadically over a period of years for the intact woman, the short term symptoms manifest within days of removal of the ovaries. There is a list of 34 Signs of Menopause composed by the women of The Menopaus List. Different sources will show varying lists.