While most countries have no limits for mortality registration, some countries impose a lower limit on gestational age and/or weight threshold for a death to be counted as a “death after live birth”. This limit is higher for the Russian Federation (28 weeks) than for other countries (see OECD, 2009). Results appear to be in the form of confidence intervals. Lower death rates reached the more problematic groups (25- to 39-year-olds) last.