Das wäre auch möglich, in dem Fall oben war halt das Geburtsgewicht um 450g unterschiedlich. Kann auch sein das das nichts zu sagen hat

It has been proved that the ovary is not overtly refractory to gonadotrophin stimulation during early
pregnancy (1). The interruption of ovulatory function imposed by pregnancy seems to result from
the suppression of the hypothalamic-pituitary gonadotrophin secretion, which is likely due to the high
concentration of oestradiol, progesterone, and possibly inhibin in pregnancy. However, exogenous gonadotrophin
can overcome this inhibition and leads to follicular growth, as in this patient, whose follicular
development was found to be normal after being stimulated with clomiphene citrate and gonadotrophin
in spite of a co-existing ectopic pregnancy. But a high progesterone state in pregnancy may turn hostile
the function of the fallopian tubes and cervical mucus; Furthermore, decidual endometrium may also
prevent subsequent embryo implantation even when another ovulation occurs. Itmayexplain that although
superfetation iscommonin some species (2), only sporadic cases in humans have been described in the literatures
(3–7). Most authorities believe that these alleged cases of human superfetation may result from
marked inequality in growth and development of twin fetuses of the same gestational age (8). Nevertheless,
small and undeveloped follicles obviously populate the ovaries in early pregnancy with functionally intact
oocytes (9). It has been shown that oocytes retrieved during pregnancy can be fertilized (10) or even initiate
a pregnancy (11).

Und hier
http://www3.interscience.wiley.com/cgi- ... 6/PDFSTART
ist der genaue Verlauf einer (angeblichen?) Superfetationsschwangerschaft, von Anfang an mit Bildern dokumentiert.
Wenn jemand den Artikel haben will, weil er ihn nicht öffnen kann (weiss nicht, ob der öffentlich ist, bin ja über das Uni-Netz eingeloggt) einfach Bescheid sagen.

Several theories have been proposed for the possible
mechanism by which superfetation occurs. These include
ovulation occurring at different times within the first 3
months of gestation, polyovulation followed by the delayed
implantation (commonly known in veterinary medicine as
hibernation) of one blastocyst2,8 and a genetic/hereditary
mechanism in which a genetically determined quantitative
or qualitative abnormality affecting placental human
chorionic gonadotropin (hCG) production might stimulate
a second ovulation and allow implantation1,4. The theory
of secondary ovulation during the early weeks of pregnancy
has been supported by the reports of Serafini and
colleagues10 and Lefebvre and colleagues11 who retrieved
oocytes from women who had undergone ovulation induction
but were found to have had either an ectopic or an
intrauterine pregnancy during the induction. The genetically
determined abnormality affecting hCG production
might be the underlying mechanism in this group.

was musst du denn da gelten lassen,es wollte doch hier niemand was beweisen? Und in dem ersten Artikel auch nicht?

Das ist jetzt NICHT als Beweis für Superfetation gedacht -die Autoren sagen nicht, dass es diesen Vorgang in der Natur unbedingt geben muss, schliessen es aber auch nicht aus. Ich fands einfach total interessant zu lesen und wollts herzeigen. Mein Schluss aus dem Artikel ist: die hätten mal besser NFP gemacht

der genaue Verlauf einer (angeblichen?) Superfetationsschwangerschaft