Most people start showing a bit earlier in a second pregnancy than they did with their first, but the exact timing is very individual.

Typical timing for second pregnancy

  • Many sources say bumps often become clearly noticeable somewhere in the 4th–5th month (about 16–20 weeks) overall.
  • With a second pregnancy, it’s common to look pregnant sooner than that because your abdominal muscles and ligaments have stretched before.
  • Some women notice a small bump (or at least a “can’t-button-my-jeans” stage) late in the first trimester, while others still don’t really show until mid‑second trimester.

A typical pattern people describe in forum discussions is noticing a bit of a belly around 8–12 weeks and feeling clearly “bumpy” by 12–16 weeks, which can be several weeks earlier than in their first pregnancy.

Why you might show earlier second time

  • Abdominal muscles are already stretched and may relax more quickly, so your uterus can project forward sooner.
  • You’re more body-aware and recognize a bump (versus bloat) earlier than in your first pregnancy.
  • If your core is less strong after the first baby, your belly can appear sooner because there’s less muscular “hold.”

Things that change the timeline

You might show earlier if:

  • You have a smaller or more petite frame.
  • You’re carrying twins or more.
  • You have less core muscle tone or had diastasis recti after the first birth.

You might show later if:

  • You’re taller or have a longer torso.
  • You have stronger core muscles.
  • Your clothes are looser, so changes are less obvious.

What forum discussions say (story‑style)

If you scroll pregnancy forums right now, you’ll see posts like:

“First baby: not obvious until 17 weeks. Second: I could see a bump at 8 weeks and strangers noticed around 12–14 weeks.”

Others say they’re on their second pregnancy and still hiding it in regular clothes until close to 20 weeks, especially with a longer gap between pregnancies and average body weight.

If you’re trying to hide it for a while

  • Choose looser tops, layered outfits, and darker colors.
  • High‑waisted leggings or jeans can smooth early bloat.
  • Dresses with patterns or ruching can disguise a small bump.

Direct answer to your title

When people answer “When did you start showing second pregnancy?” the most common range is:

  • Small personal bump: around 8–12 weeks,
  • Noticeable to others: around 14–20 weeks,
    with earlier showing compared with their first pregnancy, but lots of individual variation.

Information gathered from public forums or data available on the internet and portrayed here.