Michelle Obama pushed a theory suggesting a correlation between older sperm and autism diagnoses, before immediately backpedaling on the remark.

The former first lady made the shocking remark on Wednesday's episode of her podcast IMO, which she co-hosts with her older brother Craig Robinson.

The duo were discussing women's health issues with OBGYN Dr. Sharon Malone, when Obama seemingly took aim at Donald Trump and the vaccine skeptics in his cabinet.

Obama asked Malone if there was a 'connection between aging sperm and birth defects', before alleging that Republicans would 'cut out research on that'.

Malone replied: 'There is some anecdotal data that says older sperm.