•Early opinions of the Church in Rome and teachings of St. Thomas Aquinas that the fetus could not be baptized in-utero required some sort of solution. Consider also that this require amniotomy so that holy water actually came in contact with the fetus.
•In 1573 the Catholic Church in Frankfurt empowered midwives to perform intrauterine baptisms.  - Pence, Midwifery & Childbirth
•Accordingly, in consideration of the great many instances whereby attempts were made to introduce all manner of substances into the vagina or uterus it is conceivable that in anticipation of eminent fetal demise that one might consider baptism of the fetus in-utero by means of a specially designed syringe.
A “Syringe for injection into the womb”