Franchomme and Penoel, in their work titled L’Aromatherapie Exactement, write about how essential oil molecules have similarities in shape and action to the hormones our bodies create, even how oils can be used by the body as raw materials for building hormones.

I have compiled a list of single essential oils that are supportive of the hormone/endocrine system in the body. With some it is indirectly, by supporting the nervous system. These are in no particular order. Only you can discover which oil(s) are best for you. I have coaching techniques that I teach my clients about how to better discover which oils will work for them.
sage
clary sage
rosemary
clove
fennel
geranium
tangerine
rose
vetiver
bergamot
ylang ylang
nutmeg
German chamomile
tarragon
lavender
cypress
blue tansy
niaouli