How dad’s stress changes his sperm
RNA-packed vesicles that glom on to the germ cells can be altered by a stress hormone, a mouse study suggests
![sperm](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/11/111517_LS_spermstress_feat.jpg?fit=860%2C460&ssl=1)
NOT BUNDLES OF JOY Stress may change the genetic contents of sperm by tweaking small packets of RNA in seminal fluid, a study in mice suggests.
Dennis Kunkel Microscopy/Science Source