Yes but SimGuruSarah also said that giving a romantic massage on the new massage table has the chance to give the "high fertility" moodlet which will increase your chance of twins or triplets.
My sims got pregnant on vacation, and during their first day back in the real world, before the pregnancy was announced, the dad-to-be gave the mom-to-be a romantic massage. I did nothing else to encourage multiple births, and she had twins.
I love the massage table - the energy replenishment is fantastic and the moodlets are very nice. My only complaint is that if the massage table is in my house, paparazzi keep trying to initiate massages wIth my sims. The sims then go to the table and stand there until the paparazzi gives up trying to get in the house... At which time the paparazzi initiates another massage. Putting the tables in at the gym works all right.
The sauna is marvelous - the hydrotherapy cures fatigue, the mud bath gives a nice 24 hour buff and a decent energy boost. I haven't conceived any kids in the sauna yet.
One object that I really love that comes with this world is the outdoor shower. Sims don't need privacy to use it, they shower in their swimsuits, it gives the great shower buff, and it's cheap to buy. I keep one handy by my sculpting stations and inventing workbench.