CONSIDERING the WOMB, not only as the _Center_, in which the vitious _Humours_ are accumulated from all the other _Parts_, but also as the PUMP of the _Body_, we may readily conclude that as long as it regularly ejects the _Menstruous Blood_, it does at the same time duly evacuate together with it, all those _Humours_ of whatsoever sort they be: Whereas we may easily conceive that whatever obstructs or impedes the WOMB in any of its natural _Functions_, may occasion various _Symptoms_ to the _Woman_: However the most of _these_, as well as the most dangerous, take their _Origin_ from the _Retention_ of the SEED and the _suppression_ of the MENSTRUA. THE _Menstruous Blood_ flowing in a natural Course to the _Uterine Veins_, when its _Passage_ is so obstructed, that it cannot break forth; whether in VIRGINS, because of the _Astriction_ of the ORIFICES; or in WIDOWS, because of the _Thickness_ of the BLOOD, or of any other gross viscid _Humour_; in these _Cases_, it must of course regorge thro’ the _Branches_ of the VENA CAVA and the great ARTERY, to the _Head_, _Heart_, _Liver_, and _Veins_ of the _Midriff_; whence of Consequence proceed various _Symptoms_ in all these and their dependent _Parts_: Which notwithstanding, I take the too long retain’d SEED to occasion the more dangerous and severe _Symptoms_ to the WOMAN. BUT in _Case_ of either of _These_, namely, either the _Seminal_, or the _Menstruous Matter_, beginning to corrupt, and consequently to acquire malignant _Qualities_, then they produce divers most severe and dreadfull _Symptoms_; and _that_ not only in different PATIENTS, but also sometimes in _one_ and the _same Woman_; and not only at _different Times_, but also sometimes at _one_ and the _same Time_: However these Things always happen, according to the different _Quantity_ and _Quality_ of the corrupted HUMOURS, as well as according to the _Constitution_ of the WOMB, in which the _Corruption_ succeeds. Again more particularly—— IF the Malignant _Vapours_ arising hence, penetrate to the _Heart_, (the principal _Organ_ of LIFE, as well as of the _Circulation_ of the BLOOD) I would observe, that, they occasion vellicating _Palpitations_, as also a _Dejection of Spirits_, and _Anxiety of Mind_, attended with frequent LYPOTHYMIES and SYNCOPES: If to the _Diaphragm_ and _Lungs_, a _Difficulty_ of BREATHING, attended (as it were) with _Suffocations_ or _Strangulations_.