Just looked into this. Seems like all of the concern originated from one blog by a PhD student who hypothesized that antibodies against syncytin-1 could cause sterility in women. This is a reasonable hypothesis, but I have not seen any evidence that 1) coronavirus expresses syncytin-1 or a comparable antigen; 2) patients exposed to coronavirus develop antibodies against syncytin-1; 3) patients who receive the vaccine develop antibodies against syncytin-1.

Tl;dr: This is likely fake news. The claims make no scientific sense.

Edit: For anyone else passing by, I don't think anyone other than the developers of the vaccine can comment on its safety, and even then with how politicized it's become I would be hesitant to receive the vaccine.

Just looked into this. Seems like all of the concern originated from one blog by a PhD student who hypothesized that antibodies against syncytin-1 could cause sterility in women. This is a reasonable hypothesis, but I have not seen any evidence that 1) coronavirus expresses syncytin-1 or a comparable antigen; 2) patients exposed to coronavirus develop antibodies against syncytin-1; 3) patients who receive the vaccine develop antibodies against syncytin-1.

Tl;dr: This is likely fake news. The claims make no scientific sense.

Just looked into this. Seems like all of the concern originated from one blog by a PhD student who hypothesized that antibodies against syncytin-1 could cause sterility in women. This is a reasonable hypothesis, but I have not seen any evidence that 1) coronavirus expresses syncytin-1 or a comparable antigen; 2) patients exposed to coronavirus develop antibodies against syncytin-1; 3) patients who receive the vaccine develop antibodies against syncytin-1.

Tl;dr: This is likely fake news.