This just in. Cheryl took the girls in for their 2 month check-up (4 months actual / 2 months 1 week adjusted) and here are the statistics relating how they are progressing:
Megan is now 11 # 10.5 oz / 5.3 kg
Maribeth is now 9 # 3.5 oz / 4.18 kg
Megan is now 22.75 in / 57.79 cm
Maribeth is now 22 in / 55.88 cm
Megan's head is now 39 cm / 15.35 in
Maribeth's head is now 37.5 cm / 14.76 in
The long and the short of it (ha ha) is
Megan is now in the 75th percentile on the height / weight charts for a 2 month old! Wowie! And she can hold her head up by herself when supported in the sitting position.
Maribeth is now in the 10th percentile on the height / weight charts for a 2 month old! Yeah! She was previously only in the 3rd percentile on the charts.
Finally, those who have been wondering about Cheryl's iron blood test can stop searching the heavens for a sign: the number that came back is 13.6. Sorry no units, or indication if this is a percentage.