Green’s Dictionary of Slang

nursery n.

[its role in procreation]

1. a brothel, or a place frequented by prostitutes.

[UK]E. Gayton Pleasant Notes III ii 76: Those Countries were better furnished with She-Nurseries and Seminaries of no Religion.
[UK]Head Eng. Rogue I 133: I caused the Coachman to drive me to one of the principal Nurseries of Venus, Whetstones Park.
[UK]London Jilt pt 2 42: A certain Tavern in Covent Garden which had the reputation of a [...] great Nursery of Gallantry.
[UK]E. Gayton Festivous Notes III ii 116: He imagined this place contained a she-nursery.

2. the vagina.

[UK]‘Walter’ My Secret Life (1966) IX 1837: I [...] occasionally visited one or two nurseries of Venus, tho on the whole was true and chaste.
[UK]Farmer & Henley Sl. and Its Analogues.