The next Venus retrograde lasts from May 13, 2020, to June 25, 2020. It is going to resuffle your relationships. BAd marriages may fall apart. Take care of your food, sleep and love. As i use to say, planet has maximum effect in first shaddow period. Venus will enter in this zone from 9 April . 2020.
At present Pluto , Saturn , and Mercury are in Shadow periods. Jupiter will join them on February 18.
It will be 5 Deg Gemini to 21 Degree Gemini. Planets lying in this reason will get its impact. This retrograde happens in once in 18 months.