Not in the legal an Constitutional sense of English Common Law based upon secular common law including natural law
The 21 week fetus is not a quick fetus but a 22 week fetus can be a quick fetus based upon the scientific and modern medical technology of when a baby has survived after being separated from its mother prematurely.
Legal standards? Well ok, why would a 21 week old fetus not be “similarly situated” to a 22 week old fetus.
Careful now, be real careful. You might look all racist and homophobic with your answer.