Hi...........The hominid
ILIAC-BLADE / PELVIS-BONE fossil-record-evidence indicates a trend towards a
shorter-and-wider iliac-blade resulting in a shorter-but-broad bowl-like
pelvis, a prerequisite for keeping the center-of-gravity stable while walking;
with a drawback of their birth-canals becoming increasingly smaller than of
their quadrupedal-ancestors / cousins, though it widened comparatively to
.........from Australopithecines to Primitive / Archaic / Early-modern-man
permitting the passage of newborns due to encephalization ; though the
vaginal-widening is limited to the upper-portion since further widening would hinder
normal bipedal-movement. This effectively means
early-bipedal-ancestral-hominid-fossil-species including Salenthropus
tchadensis,Orrorin tugenensis and Ardipithecus ramidus / kaddaba species had
birth-canal sizes same as quadrupedals like chimps, gorillas and orang-utans due
to the long-iliac-blades and narrow-pelvises.
The becoming smaller of the
birth-canal due to the shortening pelvis stimulated / enforced by a shortening-and-widening
iliac-blade became an obstacle when encephalization begun in early humans which
consequently prompted a shorter-gestation-period to accommodate / sustain or facilitate
the passage of new-borns before the increase in prenatal cranial size-and-volume became too much for
the birth-canal to bear / sustain to pass-or-fit through; and the reason anatomically-modern-humans
give birth to premature offspring unable to walk much before 12-months and got greater
neoteny compared to other primates
motile at a much earlier age; which in turn effectively translated to mean an increased-dependency of offspring on their
mothers to close-the-gap on the completion of the increase
post-natal-brain-growth-pattern in size-and-volume allowing for
extended-periods of social-learning and language-acquisition in
juvenile-humans; a phenomenon which in human-evolution had a big-effect upon
the female-reproductive-cycle causing the evolutionary-adaptive-behavior of a
more frequent appearance of monogamous-relationships in humans comparatively to
other great-apes more deceitful and promiscuous as far as parental-investment
goes due to the prolonged-infancy of offspring.
The anatomical/morphological
and developmental-changes in the birth-canal becoming smaller due to the
shortening-broadening bowl-like pelvis stimulated by evolutionary-pressure-conditions
exerting forces shortening-and-widening the iliac-blade from its
long-and-narrow length due to early-bipedal-ancestral-hominid-fossil-species
ADAPTATION –OF-BIPEDALISM to keep the center-of-gravity stable while walking, a
phenomenon characterizing human-evolution, in turn resulted in the adoption of
delayed-human-sexual-maturity to allow for the optimization of maximum
pelvis-bone and birth-canal sizes; a phenomenon which in turn again also led to
the evolution-of-menopause; meaning once they begin giving birth / siring
new-borns , the birth-canal and pelvis-bone stop growth- and-development
stagnating at that size!
Now here’s the catch. The
Turkana as televised in a documentary-broadcast not long ago still got some of
their women-folk preferably give birth-at-home where according to
custom-and-tradition, they’re captured revealing that such home-births OCCUR
THROUGH-THE-REAR in a BOWED-POSITION/POSTURE, much like an ordinary animal
anywhere on all-fours would ; whereby the newly born is supposed to kinda ‘DROP-WITH-a-THUD’
on ITS-BELLY mimicking the crawling-position on all-four-limbs. The logic is
that jus’ like going for a long-call in a SQUATTING-POSITION facilitates the
effectiveness-and-intensity of EX CREATING-STOOLS / FECAL-MATTER, so does
GIVING-BIRTH IN A SQUATTING-LIKE / BOWED-POSTURE INCREASE THE
EFFECTIVENESS-and-INTENSITY of the processes of LABOR-and-GIVING BIRTH
compounded by INTERNAL-VARIATIONS of the PELVIC-REGION-SIZES in anatomically-modern-humans
Homo sapiens sapiens forcing some women to face the knife unnecessarily in CAESAREAN-OPERATIONS. The reason is that in a squatted-or-bowed position, that’s
when the FEMUR/thigh-bone fits into its adaptively-evolved slightly more
ANGULAR-POSITION to move the Center-of-Gravity into DIRECT-ALIGNMENT with the Geometric-Center-of-The Body which greatly reduces the MECHANICAL-and-PHYSICAL
STRESSES associated with GIVING-BIRTH therefore optimizing the
intensity-and-effectiveness of PASSAGE-of-NEWBORNS through the BIRTH-CANAL
constrained by internal-variations of the pelvic-region in Homo sapiens
sapiens. This is cause the fetal-head is naturally always in a
transverse-position compared to the mother during entry into the birth-canal
whereby it rotates about 90-degrees to face the mother upon exit ; which means
that if the mother is in a squatted / bowed posture, rotating at about
90-degrees after entry into the birth-canal will leave the baby facing the
opposite direction of the mother rendering both in a ‘ back-to-back’ positions
requiring the baby to then customarily traditionally ‘land-on-its-belly’ on
all-fours resembling the crawling-position.............The length-and-breadth
of the point is the morphology of anatomically-modern-humans is
naturally-adapted to give-birth through the REAR / SQUATTING / BOWED-POSITIONS like the rest of
the animal-planet-kingdom; and that the ‘frontal-legs-spread-wide-apart’ in a
SITTING-POSITION is not only cumbersome but UNNATURAL-ALTOGETHER and is merely
an innovated, adopted-posture; going by the self-evident / speaking evidence of
THE MECHANICAL-and-PHYSICAL STRESSES involved! Thus Man should face the reality,
embrace our animal-heritage and accommodate it in medical-procedures in standard-labor-practices in hospitals worldwide and celebrate
nature-and-evolution. Period . Later, logistics.