When an Israeli shell struck Gaza's largest fertility clinic in December, the explosion blasted the lids off five liquid nitrogen tanks stored in a corner of the embryology unit.
As the ultra-cold liquid evaporated, the temperature inside the tanks rose, destroying more than 4,000 embryos plus 1,000 more specimens of sperm and unfertilized eggs stored at Gaza City's Al Basma IVF centre.
The impact of that single explosion was far-reaching -- an example of the unseen toll Israel's six-and-a-half-month-old assault has had on the 2.3 million people of Gaza.
