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SECT. VI. Of involuntary voiding, and stop∣ing of Urine.
THE seat of the Bladder which is just up∣on the Womb, is sufficient to instruct us, why Women with Child, are sometimes troubled with difficulty of Urine; and why often they cannot hold their water; which is caused 2 ways, 1. because the Womb by its bigness and weight presses the bladder, so that 'tis hindred from its ordinary extension, and so incapable of containing a reasonable quantity of Urine; which is the cause the big∣ger she grows, and the nearer her time, the oftner she's compelled to make water, 2. if the weighty burthen of the Womb doth ve∣ry much press the bottom of the bladder, it forceth the Woman to make water every mo∣ment, but if the neck of it be pressed it is fil'd full with Urine, being not able to expel it, because the Sphincter Muscle, in this compres∣sion, cannot be opened to let it out, which causes great pain. Sometimes by its sharp∣ness, stirs up the bladder often by pricking it, to discharge it self; and sometimes by its