Bullshit.
I'm honestly unaware of where the 70% number came from (I may simply have missed it), but he, alongside former Council of Europe Parliament chair Wolfgang Wodarg jointly filed a document with the EMA urging that a large-scale roll-out of the vaccine be delayed until further trials could be ran on it which accounted for pregnancy [5].
His primary concern was that it would impact placental development.
Michael Yeadon worked with Pfizer between 1995, and 2011 where he was the Chief Science Officer, and Vice President of the company's R&D division focused on allergy and respiratory illness [0].
In 2011, Pfizer decided to narrow its focus down to five distinct areas of research, and closed down Yeadon's lab [1, 2].
Yeadon, along with two other colleagues secured venture funding from Pfizer's investment fund, and license from Pfizer to continue their research as an independent company called Ziarco, which continued to operate until it was purchased by Novartis in 2016 in 2016[3, 4]
Since cashing out, Yeadon has operated as a research consultant [0].
Yeadon is notably a lock-down skeptic, and has made claims that London has long since reached herd-immunity. He's a biochemist, not a virologist. I don't know how correct he is or isn't. But his history suggests that he's not someone who's opinion on pharmaceuticals should be taken lightly. Wodarg has similarly suggested that the COVID pandemic is overhyped. Wodarg's a politician with some medical education. I don't know that he's anywhere near authoritative.
[0] https://www.linkedin.com/in/mike-yeadon-3818613/
[1] http://news.bbc.co.uk/local/kent/hi/people_and_places/newsid...
[2] https://www.sfgate.com/business/article/Pfizer-narrows-its-f...
[3] https://drug-dev.com/ziarco-pharma-acquires-pfizer-drugs-sec...
[4] https://www.forbes.com/sites/johnlamattina/2017/03/15/turnin...
[5] https://dryburgh.com/wp-content/uploads/2020/12/Wodarg_Yeado...
Honestly this whole poll post should be shut down. The amount of misinformation being shared is astounding.