Response to @madamrey3: "In an all women society, many women will still be pregnant with sons at the time of disappearance, so yes, women can rebuild easily"
"Let's apply some numbers to our thought experiment. There are currently 3.9-billion women on Earth: if we assume that, in the aftermath of the disappearance of all sperm-producing individuals, a full third of them don't survive, that is still 2.6-billion women. If just 1% of them use the material stored in the various sperm banks around the world, and just 10% of those attempts take, and just half oft hose pregnancies come to term, that is 1.3-million live births within the first year. If half of those births are male, and just half of those males survive to adulthood, that's 325,000 new males born every year, which works out to more than 5.86-million males within eighteen years. For reference, that's more than the entire population of Denmark."