The inner Orifice of the Womb, is a perforation like the Head of a Man’s Yard; ’tis the beginning of a narrow Passage, which enlarges to afford a way for whatever enters or comes from the Womb; it opens to receive the Seed in the moment of Ejaculation; and upon Conception shuts close, and so continues till towards the last Month of the Woman’s Reckoning: It is compos’d of Membranes wrinkled and furl’d up, capable of dilating themselves to a great extent. This is the part which gives the Woman pain in Child Birth, the Orifice being small, and opening but gradually, pursuant to the Efforts of the _Fœtus_, which retards the Birth. After the Child is past; this Orifice is lost, and the whole Womb is only one large Cavity reaching from the entry of its Neck to the bottom; but this is of very short duration, for these parts very soon contract themselves like an empty Purse, and resume their natural posture. The Action of this inner Orifice is purely natural. The Substance of the bottom of the Womb is Membranous, and about a Fingers breadth thick, so that it dilates its self very commodiously: The inner Surface is interlac’d with a great many small Pores, and little Vessels which distil the menstrual Blood in Monthly Quantities. The Womb has Nerves, Arteries, and Veins, dispers’d. The Nerves give it a sense of Pleasure and Pain, and a sympathy with all parts of the Body: The Arteries and Veins are call’d the _Spermatick_ and _Hypogastrick_, and consist of an infinite number of Branches springing from all parts of the Womb, exporting the Blood to the Trunk of the _Vena Cava_: The Womb is sprinkled on all sides with Blood imported by the Arteries. These Arteries not only furnish the Womb with a proper Nourishment, but also pour in Blood upon the _Placenta_, in order to be sent through the Navel String to the _Fœtus_. When a Woman is not with Child, this Blood slips away thro’ the several Vessels into the Cavity of the Womb, and from thence it passes the _Vagina_ every Month. In teeming Women these Branches sometimes discharge Blood, when there is a greater quantity than is necessary for the Nourishment of the Child. The spermatick _Artery_ divides it self into two Branches, one repairing to the Testicle, and the other to the Womb. It carries Blood in one of its Branches to the Testicle, in order to the secretion of Seed, and by the other Branch it furnishes the Womb with Blood for its Nourishment, and the superfluous Blood is carried back by two Branches of Veins, one from the Testicle, and the others from the Womb.