Australian Convict Fecundity, 1790s

From In For The Long Haul: First Fleet Voyage & Colonial Australia: The Convicts' Perspective, by Annegret Hall (ESH Publication, 2018), Kindle pp. 227-228:

In early 1791, Rose Hill [now Parramatta] had a population of about 550 people but only 16 children. This meant that the young received extra attention from everyone and were often spoilt. Many convicts had left families behind in England, so seeing small children brought them both sadness and joy. The First Fleet arrived in January 1788 with only 54 children on board. Over 80% of the transported females were of childbearing age, between 15 and 45 years, so it is not surprising that a further 59 children were born to the colony by February 1790. Child numbers surged with the arrival of later fleets, and by the end of 1791 there were 249 (half below the age of 2) in the colony, and 39 of them lived in Rose Hill.

Because of the supposedly low food intake of convict women, the high birth rates in the early years of settlement have puzzled historians and medical scientists. One explanation for the high fecundity is that the atrocious diets in English gaols had kept the women’s body weight below that needed for fertility, whereas the adequate rations aboard the transport ships and at the settlement had reversed this. The prompt conception of baby Robert Rope was evidence of Elizabeth’s robust health when she stepped from the Prince of Wales in January 1788.

Concomitantly, during the colony’s “hunger years” (1789-1790), one might have expected female fertility in the settlement to drop. Diaries and letters from the first two years of the colony show that the above average birth-rate surprised the government administration. Watkin Tench credits this to the healthy climate:

I ascribe the great number of births which happened, considering the age and other circumstances, of many of the mothers. Women who certainly would never have bred in any other climate here produced as fine children as ever were born.

The Surgeon’s Mate [name unknown] on HMS Sirius wrote ‘Our births have far exceeded our burials; and what is very remarkable, women who were supposed past child-bearing, and others who had not been pregnant for fifteen or sixteen years, have lately become mothers’. And marine John Nicol, from the Second Fleet, was astonished that ‘old women’ had new-born babies, ‘There was an old female convict, her hair quite grey with age, her face shrivelled, who was suckling a child she had born in the colony. Every one went to see her, and I among the rest. It was a strange sight, her hair was quite white. Her fecundity was ascribed to the sweet tea’. Of course, the stress of prison life and punishments made some convicts look prematurely old – grey or white hair was not really a gauge of age.