II. THE _natural Cause_ may also depend upon the _FORMING FACULTY_; so far, as the _Formation_ and _Perfection_ of the _FOETUS_ depend upon its _Strength_ or _Debility_: For as it may be evidently observ’d after the _BIRTH_, that _some Children_ grow a-pace and very suddenly; _others_ (because of a _sickly Constitution_) thrive but very little, and grow slowly; so it happens also with the _FOETUS_ in the WOMB: for the _stronger_ that this _Faculty_ is, the sooner _Formation_ is perfected, and consequently the sooner the _BIRTH_ follows successfully.
III. THE Natural _Cause_ again may depend upon the _Temperature_ of the WOMB: Because that the _Woman_ (being the only _one_ of all Creatures which tolerates _Copulation_ during the time of _Pregnancy_) may be, by its frequent or immoderate _Use_, disorder’d in that noble _Part_; which may infallibly confound and pervert the regular TIME. For as the BUDS of _Vines_ cherish’d in the Bosom of the _Earth_, may be easily cut or dissipated by the _Plough_; so as at least to alter the TIME of _Fructification_, if not quite to destroy _Them_: So it is not very unlikely with the INFANT in the WOMB; and therefore wise _Nature_ (sollicitous of _Propagation_ and _Preservation_ of the _Human_ FOETUS) will not allow that a _Woman_ should have one _precise Time_ of _BIRTH_.
IV. THE Natural _Cause_ may also depend upon the _Constitution_ of the MOTHER, so far as her _Habits_ of Body, and _Way of Living_, are conducive (or _not_) to the _Maturation_, _Perfection_, _Strength_, or _Debility_ of the _INFANT_.
V. AND finally, the _Cause_ may depend upon a _superiour Influence_, in so far that, as we see with our _Eyes_, such _Grain_ as is _sowed_, and such _Plants_ or _Trees_ as are _planted_ in the _Interlunium_, or _silent Moon_, and before _Full-Moon_, to fructify and _ripen_ sooner than others: Or, as we see and perceive our very _Nails_ and _Hair_ which are _cut_ in that Time, to _grow_ faster and sooner, than what is so _cut_ after the _Full-Moon_: So we may as easily comprehend by our _Reason_, that these _Times_ may have the same Natural _Effect_ in the[150]_Human Seed_. And as then the _Parts_ are more _Succulent_, and the _Generative Virtue_ more _excitated_, not only in the _Human Seed_, but also in all other _Seeds_ and _Roots_, what wonder is it, that the _Womb_ be also more _efficacious_ and _prestant_ at the same _Conjuncture_?