Humans say it is a human right not to be excluded from medical procedures based on sex. Not allowing women access to medical procedures is discrimination.
Science says when a fetus is viable based on the study of human developmental biology.
There are many abortions performed when the fetus would have been able to survive if it had been delivered rather than aborted. These abortions are the most clearly wrong. With advancements in medical technology, viability outside the womb has become increasingly earlier in pregnancy over time.
Restrictions on abortion are not prohibiting women from receiving abortions based on their sex.
Abortions until viability is a decision only the mother should be taking. Science tells us that viability is around 22-24 weeks.
If you want to be on the side of caution, make the laws allowing all abortions until 16 weeks, or thereabouts.
Restrictions on abortions implicitly discriminate against women.
Imagine if states had different laws against receiving cancer treatments based on the size of your prostate. Some states would allow treatments as soon as the cancer is detected, others will say that your prostate has to be larger than 4 inches. Most men with prostate cancer will be prevented from receiving their treatment in that state. The laws would discriminate against them without explicitly stating that men are prevented from receiving their cancer treatment.
I would not compare an abortion to cancer treatments. One is a life saving treatment and one is, what I don’t think anyone would disagree with is an elective procedure. I would also describe an abortion as not medically necessary. (If there is serious, credible medical evidence that the mothers life is in serious danger, she should have the right to decide if she wants an abortion).
There is perhaps a valid argument regarding viability. However if you make this argument. However anyone who makes this argument has their credibility go away when they advocate for abortions up until the baby is delivered. I would counter however that it is illegal to take actions that induce someone to harm or kill themselves.
I will admit that 6 weeks pregnant is probably earlier than appropriate to limit abortions due to the time it takes a women to realize they are pregnant. However, viability is well past the time it takes a women to realize they are pregnant and make the decision to get an abortion (or not).
I would also say that it is not uncommon for men to pressure women to get an abortion of an unwanted baby. I don’t have data, but I think an outsized percentage of abortions in late stages of pregnancy are the result of this pressure.