Startling at loud sounds.
About the size of a grapefruit — or a chinchilla, or a jam roll. 29 cm (11.4 in), 500 g (1 lb 2 oz).
What's happening this week. Hearing is sharp enough now that a sudden noise can make the baby startle. The skin is still loose and wrinkled — the fat to fill it is on its way.
Startles at loud sounds. Lungs growing blood vessels. Skin still loose and wrinkled.
A loud bang nearby can make the baby jump — and you may feel it happen.
What your partner can do this week: Pick the conversation you've been avoiding — money, family, or who does what in the first weeks. Check that the car seat you like actually fits your car. Answer the kicks your partner shares — a tap back from work counts.