7 Weeks Pregnant

Baby’s Development

Embryo ~8-13 mm (blueberry) [1]. The embryonic period is the most rapid organ formation of pregnancy. All major organs have begun forming — heart (now 4 chambers), brain, lungs, liver, kidneys, intestines. Heart rate peaks ~150-170 bpm. Brain hemispheres visible on ultrasound. Eyelids forming (fused shut), tongue forming, lips forming, nostrils visible as depressions. Inner ear structures complete. Arm/leg buds flex at elbows/knees; digital rays more defined. Bones begin ossifying (cartilage → bone). Intestines are still herniated in umbilical cord. Liver produces red blood cells until bone marrow takes over [2].

Pregnancy Symptoms

hCG peaks ~weeks 8-11, so symptoms can intensify before they ease. Nausea at worst for many. Fatigue profound. Frequent urination. Heartburn starts (progesterone relaxes esophageal sphincter). Saliva increase. Mood swings. Constipation. Breast heaviness. Some get headaches (safe Tylenol OK). Acne (testosterone surge). Food/smell aversions sharp [2].

Body Changes

Uterus ~size of a lemon, still pelvic. Weight gain minimal or none. Visible veins (blue lines on breasts, “milk lines” down torso) — blood supply ramping up. Breasts: nipple/areola darken, may itch. Linea nigra may start (line down belly, more visible in dark-skinned). Hair/texture may change [2].

Tips for Week 7

• Attend dating ultrasound (7-8 weeks) — crown-rump length (CRL) most accurate dating method (±5 days). Confirms viability, singleton/twins, location [1].
• Nausea toolkit at full strength: B6 25mg 3x/day + Unisom 25mg at night, small frequent meals, ginger, acupressure wristbands. If < 5 lbs total gain and no vomiting, you’re fine [3].
• Stay active — fatigue tempting you to rest, but mild exercise (walk, swim, prenatal yoga) reduces fatigue and mood swings.
• Begin interviewing OBs/midwives if you haven’t chosen. you — questions: intervention philosophy, hospital affiliation (Washington Hospital, Eden Medical Center, UCSF Benioff?), high-risk experience (ovarian cyst, IVF, age 35+), on-call model.

Things To Do (Checklist)

• Attend dating ultrasound; confirm CRL
• Continue nausea toolkit; call OB if can’t keep fluids
• If not done: choose OB/midwife + practice affiliation
• Gentle daily exercise: 20-30 min, stay cool
• Plan first “official” announcement (after week 12?)

Frequently Asked Questions

Q: When does the nausea end? A: 90% resolve by week 14-16. Some have it through week 20+. Rare (hyperemesis gravidarum: 0.3-2%) needs medical treatment [3].

Q: Is the fetal heart rate too fast? A: 150-170 bpm is normal this week. Faster is common; slow < 100 bpm by week 7 raises concern. Discuss trends, not single readings [2].

Q: Can I have sex? A: Yes, low-risk pregnancies can. Spotting after is common (cervical friability). Avoid if bleeding, pain, preterm labor risk [1].

For Dads

• Drive to the ultrasound, take the day semi-flexible — that heartbeat moment is emotional; don’t have a 2 PM back-to-back.
• Become the “smell detective” — your partner’s triggers will be specific and weird. Coffee? Garlic? Her own shampoo? You learn, you adapt.
• Load up on quick snacks — almonds, granola bars, string cheese. She’ll need food at inconvenient times.
• Read “What to Expect When You’re Expecting” Ch. 4-5 — the most cited reference; balanced against Oster, good for the “what’s normal” anxiety.
• Pray for organ development this week — hands, eyes, ears, heart chambers.

Sources

1. ACOG — How Your Fetus Grows During Pregnancy
2. Mayo Clinic — 7 Weeks Pregnant
3. What to Expect When You’re Expecting — Heidi Murkoff (Chapter 4: First Trimester)