No. You are born with them and they stay with you throughout your life. That is why they are called birth marks.
That is not a typical pregnancy sign. It's just hormones when we grow. Getting on birth control pills can make them grow faster and then the marks show up.
No. They develop as they grow up. They are like birth marks. Leopards are born furless and spotless.
Elliott Marks's birth name is Elliott Stephen Marks.
Alfred Marks's birth name is Alfred Edward Marks.
Arthur Marks's birth name is Arthur Ronald Marks.
Debbie Marks's birth name is Debra F. Marks.
Eugene Marks's birth name is Eugene Robert Marks.
Garnett Marks's birth name is Garnett Anderson Marks.
Griffin Marks's birth name is Griffin Daniel Marks.
Jimmy Marks's birth name is James Stanko Marks.
Louis Marks's birth name is Louis Frank Marks.
Torey Marks's birth name is Victoria Hope Marks.