After ovulation and the interception of the egg cell by the
fimbriae of the oviduct, the egg cell (or
ovum or oocyte) with her surrounding nutritive cells is
in the oviduct (or fallopian tube).
The egg cell is transported to the uterus by the flow of liquid
in the oviduct and by the movement of the cilia in it. Both the egg and
the mucus membrane of the fallopian tube produce substances that
attract sperm cells. The sperm cells swim against the stream from the
vagina through the uterus and oviduct to the egg. Many sperm cells
(> 90%) get stuck behind barriers such as cilia or are damaged
by antibodies. Only some dozen to a few hundreds of sperm cells reach
the egg and surround it with their heads in the direction of the oocyte
pre-conception attraction complex
In in vitro (test tube) fertilization it is
observed that for a few hours a so called pre-conception attraction
complex exists: a state in which the egg is surrounded by several
of sperm cells, lying with their heads against the membrane of the egg
cell and their tails away from her. It has been observed, too, that
this complex starts to
rotate. This is caused by the movement of the tails of the sperm cells.
After a while they begin to
move more or less rhythmically in the same way. Van der
Wal calls this a "mating dance".
During this pre-conception attraction complex the egg secretes
substances that alter the sperm. Their cap (the acrosome)
dissolves, which enables them to connect themselves to the egg and to
fertilize the egg. The sperm cells in
turn ensure that the zona pellucida changes, so that it will let one
(and only one) sperm cell pass through. So, substances from both sides
are required to prepare the fusion of the gametes.
Both cells have to be prepared and to change to make them receptive for
the other cell. The cells interact and they change each
other. Whether the fusion succeeds is uncertain, that depends on the
interaction of the two cells.
Then the cell membrane of the egg merges with that of the sperm cell
and the contents of the sperm fuses with the contents of the egg. The
large egg receives the small sperm. Both cell membranes open up and
connect with each
other. The cell membrane is continuous, there is not - at any time - an
or hole in it where the sperm creeps through. The membranes of the egg
cell and the sperm cell always form a continuous entity. The question
remains, however, how it is determined which sperm will enter the egg.
After the fusion of the egg with a sperm cell has taken place, the zona
pellucida changes again and no sperm cell can fuse with the egg
The pre-conception attraction complex is a process that takes
time. We do not see a
race in which one sperm cell arrives first and wins ("survival of the
fittest") and it
is not true that the sperm enters or penetrates the egg either, since
the cell membranes fuse.
So, there is no race and no aggression. Both cells are equal,
need each other and prepare each other for the fusion and the
conception. The conception is a gradual process.
On the page about the egg cell and the sperm cells it was shown that
egg and sperm are polar to each other. Both cells are so far
specialized that they are not able to develop further. Only if they
meet, the joining of both extremely specialized cells can be the
starting point for a new development.
That both cells attract each other is not surprising. What the egg is,
the sperm is not and vice versa. When they meet, the one-sidedness of
each can be solved by that of the other. What was separated, is being
During the hours of the pre-conception attraction complex,
we see an ovum with her mobile cytoplasm and around it tens or hundreds
structured sperm nuclei. The usual picture of a cell in
which the nucleus is at the centre and the mobile cytoplasm is around
it, is reversed. The nuclei are now at the periphery. At the same time
the cytoplasm of the ovum is at rest in the centre
the movement of the sperm cells' tails induce the
rotation. Which is another reversal, since normally the periphery is at
rest and the cytoplasm is in motion. And thirdly, normally a
cell is in interaction with the environment at the periphery. But now
see there the secluded, non-interactive quality of the sperm cells. The
complex is directed inwards. The
pre-conception attraction complex is the reversal of the normal
conditions and relationships of a cell.
This dance of ovum and sperm-cells and the reversal of the
normal relationships during the hours of pre-conception
attraction complex, may be necessary to open up the physical
for the spiritual.
It is possible that an encounter with the soul and spirit of
a human being
is being prepared. The pre-conception attraction complex may
be the moment where the spirit-germ of the new human being is linked
physical germ. This may be the moment of the incarnation, which is
experienced or perceived by some
people. They notice not only that there is a pregnancy, but also who
Sometimes it is a feeling, sometimes this
individual makes his being or name known.
Conception and incarnation do not have to become a success. A woman and
a man do not make a child, but receive it.
It seems that the conception and embryonic development
of humans are inefficient. The probability that a human sperm
meets an ovum is small compared to mammals and then there is still the
implantation that has to succeed and
the embryo that has to develop healthily. There appear to be many more
humans (mostly unnoticed) than in mammals. Man is therefore
called an inefficient reproducer. When we take into account that an
incarnation has to take place, this is not surprising. The conception
of humans is then not only a matter of reproduction, but something of a
different order, it is about the incarnation of an individual. Every
man is a unique individuality. The parents do
not repeat themselves in their offspring, but create the conditions for
the incarnation of another human being.
Based on: Van der Wal, J, 2002. Human conception: how
to overcome reproduction?
Pre-conception attraction complex
The oocyte with
the surrounding zona pellucida and nutritive follicle cells
(corona radiata) and around it sperm