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Assessment of fetus implantation after natural mating from control and groups of human adipose-derived stem cell conditioned medium (ASC-CM) intravenous injection in (A) 4-month-old and (B) 6-month-old mice. Data are expressed as the mean ± standard error of the mean (SEM). * p < 0.05. 4D-6T, six times injection in four day intervals; 8D-3T, three times injection in eight day intervals.
